Speech perception - Knowledge

919:. Since then there have been many disabilities that have been classified, which resulted in a true definition of "speech perception". The term 'speech perception' describes the process of interest that employs sub lexical contexts to the probe process. It consists of many different language and grammatical functions, such as: features, segments (phonemes), syllabic structure (unit of pronunciation), phonological word forms (how sounds are grouped together), grammatical features, morphemic (prefixes and suffixes), and semantic information (the meaning of the words). In the early years, they were more interested in the acoustics of speech. For instance, they were looking at the differences between /ba/ or /da/, but now research has been directed to the response in the brain from the stimuli. In recent years, there has been a model developed to create a sense of how speech perception works; this model is known as the dual stream model. This model has drastically changed from how psychologists look at perception. The first section of the dual stream model is the ventral pathway. This pathway incorporates middle temporal gyrus, inferior temporal sulcus and perhaps the 989:: Pure word deafness, or speech agnosia, is an impairment in which a person maintains the ability to hear, produce speech, and even read speech, yet they are unable to understand or properly perceive speech. These patients seem to have all of the skills necessary in order to properly process speech, yet they appear to have no experience associated with speech stimuli. Patients have reported, "I can hear you talking, but I can't translate it". Even though they are physically receiving and processing the stimuli of speech, without the ability to determine the meaning of the speech, they essentially are unable to perceive the speech at all. There are no known treatments that have been found, but from case studies and experiments it is known that speech agnosia is related to lesions in the left hemisphere or both, specifically right temporoparietal dysfunctions. 1196:. The tritone paradox is where a listener is presented with two computer-generated tones (such as C and F-Sharp) that are half an octave (or a tritone) apart and are then asked to determine whether the pitch of the sequence is descending or ascending. One such study, performed by Ms. Diana Deutsch, found that the listener's interpretation of ascending or descending pitch was influenced by the listener's language or dialect, showing variation between those raised in the south of England and those in California or from those in Vietnam and those in California whose native language was English. A second study, performed in 2006 on a group of English speakers and 3 groups of East Asian students at University of Southern California, discovered that English speakers who had begun musical training at or before age 5 had an 8% chance of having perfect pitch. 776:

the underlying category. Vocal-tract-size differences result in formant-frequency variation across speakers; therefore a listener has to adjust his/her perceptual system to the acoustic characteristics of a particular speaker. This may be accomplished by considering the ratios of formants rather than their absolute values. This process has been called vocal tract normalization (see Figure 3 for an example). Similarly, listeners are believed to adjust the perception of duration to the current tempo of the speech they are listening to – this has been referred to as speech rate normalization.

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listener's memory are compared with the incoming stimulus so that the stimulus can be categorized. Similarly, when recognizing a talker, all the memory traces of utterances produced by that talker are activated and the talker's identity is determined. Supporting this theory are several experiments reported by Johnson that suggest that our signal identification is more accurate when we are familiar with the talker or when we have visual representation of the talker's gender. When the talker is unpredictable or the sex misidentified, the error rate in word-identification is much higher.

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left hemisphere. However, utilizing technologies such as fMRI machines, research has shown that two regions of the brain traditionally considered exclusively to process speech, Broca's and Wernicke's areas, also become active during musical activities such as listening to a sequence of musical chords. Other studies, such as one performed by Marques et al. in 2006 showed that 8-year-olds who were given six months of musical training showed an increase in both their pitch detection performance and their electrophysiological measures when made to listen to an unknown foreign language.

1398:'s as perceived by a listener fall within one category (voiced alveolar plosive) and that is because "linguistic representations are abstract, canonical, phonetic segments or the gestures that underlie these segments". When describing units of perception, Liberman later abandoned articulatory movements and proceeded to the neural commands to the articulators and even later to intended articulatory gestures, thus "the neural representation of the utterance that determines the speaker's production is the distal object the listener perceives". The theory is closely related to the 1129:, affect speech perception to some extent. Expressive aphasia causes moderate difficulties for language understanding. The effect of receptive aphasia on understanding is much more severe. It is agreed upon, that aphasics suffer from perceptual deficits. They usually cannot fully distinguish place of articulation and voicing. As for other features, the difficulties vary. It has not yet been proven whether low-level speech-perception skills are affected in aphasia sufferers or whether their difficulties are caused by higher-level impairment alone. 1058:

study by Patricia K. Kuhl, Feng-Ming Tsao, and Huei-Mei Liu, it was discovered that if infants are spoken to and interacted with by a native speaker of Mandarin Chinese, they can actually be conditioned to retain their ability to distinguish different speech sounds within Mandarin that are very different from speech sounds found within the English language. Thus proving that given the right conditions, it is possible to prevent infants' loss of the ability to distinguish speech sounds in languages other than those found in the native language.

1145:) and the duration of using an implant. There are differences between children with congenital and acquired deafness. Postlingually deaf children have better results than the prelingually deaf and adapt to a cochlear implant faster. In both children with cochlear implants and normal hearing, vowels and voice onset time becomes prevalent in development before the ability to discriminate the place of articulation. Several months following implantation, children with cochlear implants can normalize speech perception. 552: 752: 1000:

prosody—elements that distinguish an individual voice". There is no known treatment; however, there is a case report of an epileptic woman who began to experience phonagnosia along with other impairments. Her EEG and MRI results showed "a right cortical parietal T2-hyperintense lesion without gadolinium enhancement and with discrete impairment of water molecule diffusion". So although no treatment has been discovered, phonagnosia can be correlated to postictal parietal cortical dysfunction.

923:. The ventral pathway shows phonological representations to the lexical or conceptual representations, which is the meaning of the words. The second section of the dual stream model is the dorsal pathway. This pathway includes the sylvian parietotemporal, inferior frontal gyrus, anterior insula, and premotor cortex. Its primary function is to take the sensory or phonological stimuli and transfer it into an articulatory-motor representation (formation of speech). 743:), which are important for recognition of speech sounds, will vary in their absolute values across individuals (see Figure 3 for an illustration of this). Research shows that infants at the age of 7.5 months cannot recognize information presented by speakers of different genders; however by the age of 10.5 months, they can detect the similarities. Dialect and foreign accent can also cause variation, as can the social characteristics of the speaker and listener. 1141:

to understand unknown speakers and sounds. The perceptual abilities of children that received an implant after the age of two are significantly better than of those who were implanted in adulthood. A number of factors have been shown to influence perceptual performance, specifically: duration of deafness prior to implantation, age of onset of deafness, age at implantation (such age effects may be related to the

1545:. Through the research in these categories it has been found that there may not be a specific speech mode but instead one for auditory codes that require complicated auditory processing. Also it seems that modularity is learned in perceptual systems. Despite this the evidence and counter-evidence for the speech mode hypothesis is still unclear and needs further research. 676:), this linearity is difficult to see in the physical speech signal (see Figure 2 for an example). Speech sounds do not strictly follow one another, rather, they overlap. A speech sound is influenced by the ones that precede and the ones that follow. This influence can even be exerted at a distance of two or more segments (and across syllable- and word-boundaries). 36: 887:

sentences where target words only differed in a single phoneme (bay/day/gay, for example) whose quality changed along a continuum. When put into different sentences that each naturally led to one interpretation, listeners tended to judge ambiguous words according to the meaning of the whole sentence . That is, higher-level language processes connected with

1216:, analyzes whether "the perceptual experience of listening to speech differs in phenomenal character" with regards to understanding the language being heard. He argues that an individual's experience when hearing a language they comprehend, as opposed to their experience when hearing a language they have no knowledge of, displays a difference in 1025:. Infants learn to contrast different vowel phonemes of their native language by approximately 6 months of age. The native consonantal contrasts are acquired by 11 or 12 months of age. Some researchers have proposed that infants may be able to learn the sound categories of their native language through passive listening, using a process called 802: 1370:. Listeners were asked to identify which sound they heard and to discriminate between two different sounds. The results of the experiment showed that listeners grouped sounds into discrete categories, even though the sounds they were hearing were varying continuously. Based on these results, they proposed the notion of 1424:

The exemplar-based approaches claim listeners store information for both word- and talker-recognition. According to this theory, particular instances of speech sounds are stored in the memory of a listener. In the process of speech perception, the remembered instances of e.g. a syllable stored in the

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Neurophysiological methods rely on utilizing information stemming from more direct and not necessarily conscious (pre-attentative) processes. Subjects are presented with speech stimuli in different types of tasks and the responses of the brain are measured. The brain itself can be more sensitive than

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Computational modeling has also been used to simulate how speech may be processed by the brain to produce behaviors that are observed. Computer models have been used to address several questions in speech perception, including how the sound signal itself is processed to extract the acoustic cues used

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Speech perception has also been analyzed through sinewave speech, a form of synthetic speech where the human voice is replaced by sine waves that mimic the frequencies and amplitudes present in the original speech. When subjects are first presented with this speech, the sinewave speech is interpreted

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One of the fundamental problems in the study of speech is how to deal with noise. This is shown by the difficulty in recognizing human speech that computer recognition systems have. While they can do well at recognizing speech if trained on a specific speaker's voice and under quiet conditions, these

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If day-old babies are presented with their mother's voice speaking normally, abnormally (in monotone), and a stranger's voice, they react only to their mother's voice speaking normally. When a human and a non-human sound is played, babies turn their head only to the source of human sound. It has been

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Another basic experiment compared recognition of naturally spoken words within a phrase versus the same words in isolation, finding that perception accuracy usually drops in the latter condition. To probe the influence of semantic knowledge on perception, Garnes and Bond (1976) similarly used carrier

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Bundles of these features uniquely identify speech segments (phonemes, syllables, words). These segments are part of the lexicon stored in the listener's memory. Its units are activated in the process of lexical access and mapped on the original signal to find out whether they match. If not, another

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as a relation between phonological features and auditory properties. According to this view, listeners are inspecting the incoming signal for the so-called acoustic landmarks which are particular events in the spectrum carrying information about gestures which produced them. Since these gestures are

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Languages differ in their phonemic inventories. Naturally, this creates difficulties when a foreign language is encountered. For example, if two foreign-language sounds are assimilated to a single mother-tongue category the difference between them will be very difficult to discern. A classic example

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It may be the case that it is not necessary and maybe even not possible for a listener to recognize phonemes before recognizing higher units, like words for example. After obtaining at least a fundamental piece of information about phonemic structure of the perceived entity from the acoustic signal,

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The conclusion to make from both the identification and the discrimination test is that listeners will have different sensitivity to the same relative increase in VOT depending on whether or not the boundary between categories was crossed. Similar perceptual adjustment is attested for other acoustic

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Despite the great variety of different speakers and different conditions, listeners perceive vowels and consonants as constant categories. It has been proposed that this is achieved by means of the perceptual normalization process in which listeners filter out the noise (i.e. variation) to arrive at

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The resulting acoustic structure of concrete speech productions depends on the physical and psychological properties of individual speakers. Men, women, and children generally produce voices having different pitch. Because speakers have vocal tracts of different sizes (due to sex and age especially)

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value corresponding to how likely it is that a sound belongs to a particular speech category. Thus, when perceiving a speech signal our decision about what we actually hear is based on the relative goodness of the match between the stimulus information and values of particular prototypes. The final

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proposes that people remember speech sounds in a probabilistic, or graded, way. It suggests that people remember descriptions of the perceptual units of language, called prototypes. Within each prototype various features may combine. However, features are not just binary (true or false), there is a

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data, Liberman and colleagues worked out the motor theory of speech perception, where "the complicated articulatory encoding was assumed to be decoded in the perception of speech by the same processes that are involved in production" (this is referred to as analysis-by-synthesis). For instance, the

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restores access to the acoustic signal in individuals with sensorineural hearing loss. The acoustic information conveyed by an implant is usually sufficient for implant users to properly recognize speech of people they know even without visual clues. For cochlear implant users, it is more difficult

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are actual vocal tract movements, or gestures, and not abstract phonemes or (as in the Motor Theory) events that are causally antecedent to these movements, i.e. intended gestures. Listeners perceive gestures not by means of a specialized decoder (as in the Motor Theory) but because information in

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The exemplar models have to face several objections, two of which are (1) insufficient memory capacity to store every utterance ever heard and, concerning the ability to produce what was heard, (2) whether also the talker's own articulatory gestures are stored or computed when producing utterances

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is an emerging field related to the study of speech perception. Originally it was theorized that the neural signals for music were processed in a specialized "module" in the right hemisphere of the brain. Conversely, the neural signals for language were to be processed by a similar "module" in the

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In tests of the ability to discriminate between two sounds with varying VOT values but having a constant VOT distance from each other (20 ms for instance), listeners are likely to perform at chance level if both sounds fall within the same category and at nearly 100% level if each sound falls in a

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The research and application of speech perception must deal with several problems which result from what has been termed the lack of invariance. Reliable constant relations between a phoneme of a language and its acoustic manifestation in speech are difficult to find. There are several reasons for

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It has also been discovered that even though infants' ability to distinguish between the different phonetic properties of various languages begins to decline around the age of nine months, it is possible to reverse this process by exposing them to a new language in a sufficient way. In a research

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to the stimulation the sucking rate decreases and levels off. Then, a new stimulus is played to the baby. If the baby perceives the newly introduced stimulus as different from the background stimulus the sucking rate will show an increase. The sucking-rate and the head-turn method are some of the

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One of the techniques used to examine how infants perceive speech, besides the head-turn procedure mentioned above, is measuring their sucking rate. In such an experiment, a baby is sucking a special nipple while presented with sounds. First, the baby's normal sucking rate is established. Then a

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by being able to detect very small differences between speech sounds. They can discriminate all possible speech contrasts (phonemes). Gradually, as they are exposed to their native language, their perception becomes language-specific, i.e. they learn how to ignore the differences within phonemic

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At first glance, the solution to the problem of how we perceive speech seems deceptively simple. If one could identify stretches of the acoustic waveform that correspond to units of perception, then the path from sound to meaning would be clear. However, this correspondence or mapping has proven

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events in the signal; for example, vowels are typically marked by higher frequency of the first formant, consonants can be specified as discontinuities in the signal and have lower amplitudes in lower and middle regions of the spectrum. These acoustic features result from articulation. In fact,

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Best (1995) proposed a Perceptual Assimilation Model which describes possible cross-language category assimilation patterns and predicts their consequences. Flege (1995) formulated a Speech Learning Model which combines several hypotheses about second-language (L2) speech acquisition and which

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One important factor that causes variation is differing speech rate. Many phonemic contrasts are constituted by temporal characteristics (short vs. long vowels or consonants, affricates vs. fricatives, plosives vs. glides, voiced vs. voiceless plosives, etc.) and they are certainly affected by

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One acoustic aspect of the speech signal may cue different linguistically relevant dimensions. For example, the duration of a vowel in English can indicate whether or not the vowel is stressed, or whether it is in a syllable closed by a voiced or a voiceless consonant, and in some cases (like

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The theory has been criticized in terms of not being able to "provide an account of just how acoustic signals are translated into intended gestures" by listeners. Furthermore, it is unclear how indexical information (e.g. talker-identity) is encoded/decoded along with linguistically relevant

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Landmarks are analyzed to determine certain articulatory events (gestures) which are connected with them. In the next stage, acoustic cues are extracted from the signal in the vicinity of the landmarks by means of mental measuring of certain parameters such as frequencies of spectral peaks,

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Without the necessity of taking an active part in the test, even infants can be tested; this feature is crucial in research into acquisition processes. The possibility to observe low-level auditory processes independently from the higher-level ones makes it possible to address long-standing

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it appears to be through behavioral responses. For example, the subject may not show sensitivity to the difference between two speech sounds in a discrimination test, but brain responses may reveal sensitivity to these differences. Methods used to measure neural responses to speech include

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is associated with the inability to recognize any familiar voices. In these cases, speech stimuli can be heard and even understood but the association of the speech to a certain voice is lost. This can be due to "abnormal processing of complex vocal properties (timbre, articulation, and

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In a classic experiment, Richard M. Warren (1970) replaced one phoneme of a word with a cough-like sound. Perceptually, his subjects restored the missing speech sound without any difficulty and could not accurately identify which phoneme had been disturbed, a phenomenon known as the

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If a subject who is a monolingual native English speaker is presented with a stimulus of speech in German, the string of phonemes will appear as mere sounds and will produce a very different experience than if exactly the same stimulus was presented to a subject who speaks German.

657: 1021:; infants must learn which differences are distinctive in their native language uses, and which are not). As infants learn how to sort incoming speech sounds into categories, ignoring irrelevant differences and reinforcing the contrastive ones, their perception becomes 1160:

systems often do poorly in more realistic listening situations where humans would understand speech with relative ease. To emulate processing patterns that would be held in the brain under normal conditions, prior knowledge is a key neural factor, since a robust

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Research in how people with language or hearing impairment perceive speech is not only intended to discover possible treatments. It can provide insight into the principles underlying non-impaired speech perception. Two areas of research can serve as an example:

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predicts, in simple words, that an L2 sound that is not too similar to a native-language (L1) sound will be easier to acquire than an L2 sound that is relatively similar to an L1 sound (because it will be perceived as more obviously "different" by the learner).

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attempt with a different candidate pattern is made. In this iterative fashion, listeners thus reconstruct the articulatory events which were necessary to produce the perceived speech signal. This can be therefore described as analysis-by-synthesis.

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is "the loss or diminution of the ability to recognize familiar objects or stimuli usually as a result of brain damage". There are several different kinds of agnosia that affect every one of our senses, but the two most common related to speech are

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listeners can compensate for missing or noise-masked phonemes using their knowledge of the spoken language. Compensatory mechanisms might even operate at the sentence level such as in learned songs, phrases and verses, an effect backed-up by

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caused by damage to the brain. Different parts of language processing are impacted depending on the area of the brain that is damaged, and aphasia is further classified based on the location of injury or constellation of symptoms. Damage to

543:.) After processing the initial auditory signal, speech sounds are further processed to extract acoustic cues and phonetic information. This speech information can then be used for higher-level language processes, such as word recognition. 1420:

Exemplar models of speech perception differ from the four theories mentioned above which suppose that there is no connection between word- and talker-recognition and that the variation across talkers is "noise" to be filtered out.

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Because the speech signal is not linear, there is a problem of segmentation. It is difficult to delimit a stretch of speech signal as belonging to a single perceptual unit. As an example, the acoustic properties of the phoneme

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the acoustic signal specifies the gestures that form it. By claiming that the actual articulatory gestures that produce different speech sounds are themselves the units of speech perception, the theory bypasses the problem of

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simply does not exist in this model. The acoustic properties of the landmarks constitute the basis for establishing the distinctive features. Bundles of them uniquely specify phonetic segments (phonemes, syllables, words).

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More recent research using different tasks and methods suggests that listeners are highly sensitive to acoustic differences within a single phonetic category, contrary to a strict categorical account of speech perception.

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If a specific aspect of the acoustic waveform indicated one linguistic unit, a series of tests using speech synthesizers would be sufficient to determine such a cue or cues. However, there are two significant obstacles:

730:. Another major source of variation is articulatory carefulness vs. sloppiness which is typical for connected speech (articulatory "undershoot" is obviously reflected in the acoustic properties of the sounds produced). 1256:

Behavioral experiments are based on an active role of a participant, i.e. subjects are presented with stimuli and asked to make conscious decisions about them. This can take the form of an identification test, a

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He also examines how speech perception changes when one learning a language. If a subject with no knowledge of the Japanese language was presented with a stimulus of Japanese speech, and then was given the exact

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The next processing stage comprises acoustic-cues consolidation and derivation of distinctive features. These are binary categories related to articulation (for example , , for vowels; , , or for consonants.

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as random noises. But when the subjects are informed that the stimuli actually is speech and are told what is being said, "a distinctive, nearly immediate shift occurs" to how the sinewave speech is perceived.

532:. Research in speech perception seeks to understand how human listeners recognize speech sounds and use this information to understand spoken language. Speech perception research has applications in building 1316:

Behavioral responses may reflect late, conscious processes and be affected by other systems such as orthography, and thus they may mask speaker's ability to recognize sounds based on lower-level acoustic

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Marques, C et al. (2007). Musicians detect pitch violation in foreign language better than nonmusicians: Behavioral and electrophysiological evidence. "Journal of Cognitive Neuroscience, 19", 1453-1463.

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of speech perception are the articulatory gestures underlying speech. Listeners make sense of the speech signal by referring to them. The model belongs to those referred to as analysis-by-synthesis.

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Iverson, P., Kuhl, P.K., Akahane-Yamada, R., Diesh, E., Thokura, Y., Kettermann, A., Siebert, C. (2003). "A perceptual interference account of acquisition difficulties for non-native phonemes".

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Speech mode hypothesis is the idea that the perception of speech requires the use of specialized mental processing. The speech mode hypothesis is a branch off of Fodor's modularity theory (see

1507:). Computer models of the fuzzy logical theory have been used to demonstrate that the theory's predictions of how speech sounds are categorized correspond to the behavior of human listeners. 717:

marking the boundary between voiced and voiceless plosives are different for labial, alveolar and velar plosives and they shift under stress or depending on the position within a syllable.

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with a clear boundary between the two categories. A two-alternative identification (or categorization) test will yield a discontinuous categorization function (see red curve in Figure 4).

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Categorical perception is involved in processes of perceptual differentiation. People perceive speech sounds categorically, that is to say, they are more likely to notice the differences

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Rocha, Sofia; Amorim, José Manuel; Machado, Álvaro Alexandre; Ferreira, Carla Maria (2015-04-01). "Phonagnosia and Inability to Perceive Time Passage in Right Parietal Lobe Epilepsy".

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categories. The perceptual space between categories is therefore warped, the centers of categories (or "prototypes") working like a sieve or like magnets for incoming speech sounds.

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voiceless . Gradually, adding the same amount of VOT at a time, the plosive is eventually a strongly aspirated voiceless bilabial . (Such a continuum was used in an experiment by

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causes only limited and moreover systematic and thus predictable variation in the signal which the listener is able to deal with. Within this model therefore, what is called the

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or VOT. VOT is a primary cue signaling the difference between voiced and voiceless plosives, such as "b" and "p". Other cues differentiate sounds that are produced at different

622:) it can distinguish the identity of vowels. Some experts even argue that duration can help in distinguishing of what is traditionally called short and long vowels in English. 1192:

Conversely, some research has revealed that, rather than music affecting our perception of speech, our native speech can affect our perception of music. One example is the

771:) rather than absolute values are plotted using the normalization procedure proposed by Syrdal and Gopal in 1986. Formant values are taken from Hillenbrand et al. (1995) 590:. The speech system must also combine these cues to determine the category of a specific speech sound. This is often thought of in terms of abstract representations of 3956: 3655: 3593: 3372: 3031: 2887: 2433: 2353: 2300: 2021: 1953: 1875: 1726: 1650: 3113:

Csépe, V.; Osman-Sagi, J.; Molnar, M.; Gosy, M. (2001). "Impaired speech perception in aphasic patients: event-related potential and neuropsychological assessment".

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The methods used in speech perception research can be roughly divided into three groups: behavioral, computational, and, more recently, neurophysiological methods.

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The process of perceiving speech begins at the level of the sound signal and the process of audition. (For a complete description of the process of audition see

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theoretical issues such as whether or not humans possess a specialized module for perceiving speech or whether or not some complex acoustic invariance (see

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secondary articulatory movements may be used when enhancement of the landmarks is needed due to external conditions such as noise. Stevens claims that

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categories of the language (differences that may well be contrastive in other languages – for example, English distinguishes two voicing categories of

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Best, C. T. (1995). "A direct realist view of cross-language speech perception: New Directions in Research and Theory". In Winifred Strange (ed.).

1261:, similarity rating, etc. These types of experiments help to provide a basic description of how listeners perceive and categorize speech sounds. 3815: 767:

in a standard F1 by F2 plot (in Hz). The mismatch between male, female, and child values is apparent. In the right panel formant distances (in

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Iverson, P., Kuhl, P.K. (1995). "Mapping the perceptual magnet effect for speech using signal detection theory and multidimensional scaling".

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stimulus is played repeatedly. When the baby hears the stimulus for the first time the sucking rate increases but as the baby becomes

3498:"The perception of speech sounds by the human brain as reflected by the mismatch negativity (MMN) and its magnetic equivalent (MMNm)" 1453:

In this model, the incoming acoustic signal is believed to be first processed to determine the so-called landmarks which are special

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of this situation is the observation that Japanese learners of English will have problems with identifying or distinguishing English

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The first ever hypothesis of speech perception was used with patients who acquired an auditory comprehension deficit, also known as

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Nygaard, L.C., Pisoni, D.B. (1995). "Speech Perception: New Directions in Research and Theory". In J.L. Miller; P.D. Eimas (eds.).

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hypothesis, which proposes the existence of a special-purpose module, which is supposed to be innate and probably human-specific.

2133:; Gopal, H.S. (1986). "A perceptual model of vowel recognition based on the auditory representation of American English vowels". 932: 1179: 574:

contained in the speech sound signal which are used in speech perception to differentiate speech sounds belonging to different

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Uhler; Yoshinaga-Itano; Gabbard; Rothpletz; Jenkins (March 2011). "infant speech perception in young cochlear implant users".

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Three important experimental paradigms have evolved in the search to find evidence for the speech mode hypothesis. These are

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history may to an extent override the extreme masking effects involved in the complete absence of continuous speech signals.

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patterns consistent with the missed continuous speech fragments, despite the lack of all relevant bottom-up sensory input.

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Whether or not normalization actually takes place and what is its exact nature is a matter of theoretical controversy (see

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Hessler, Dorte; Jonkers, Bastiaanse (December 2010). "The influence of phonetic dimensions on aphasic speech perception".

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Figure 2: A spectrogram of the phrase "I owe you". There are no clearly distinguishable boundaries between speech sounds.

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Hillenbrand, J., Getty, L.A., Clark, M.J., Wheeler, K. (1995). "Acoustic characteristics of American English vowels".

1075: 880: 848:.) In this continuum of, for example, seven sounds, native English listeners will identify the first three sounds as 2931:"Foreign-language experience in infancy: Effects of short-term exposure and social interaction on phonetic learning" 597:

It is not easy to identify what acoustic cues listeners are sensitive to when perceiving a particular speech sound:

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Hillenbrand, J.M., Clark, M.J., Nearey, T.M. (2001). "Effects of consonant environment on vowel formant patterns".

1644: 1297: 1142: 1051: 536:, in improving speech recognition for hearing- and language-impaired listeners, and in foreign-language teaching. 4106: 1604: 1308:, which occurs when speech stimuli are acoustically different from a stimulus that the subject heard previously. 1445:

limited by the capacities of humans' articulators and listeners are sensitive to their auditory correlates, the

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Flege, J. (1995). "Second language speech learning: Theory, findings and problems". In Winifred Strange (ed.).

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decision is based on multiple features or sources of information, even visual information (this explains the

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Massaro, D.W. (1989). "Testing between the TRACE Model and the Fuzzy Logical Model of Speech perception".

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Klatt, D.H. (1976). "Linguistic uses of segmental duration in English: Acoustic and perceptual evidence".

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Figure 1: Spectrograms of syllables "dee" (top), "dah" (middle), and "doo" (bottom) showing how the onset

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Garnes, S., Bond, Z.S. (1976). "The relationship between acoustic information and semantic expectation".

563:

are highlighted by red dotted lines; transitions are the bending beginnings of the formant trajectories.)

4423: 4388: 4168: 4153: 3950: 3649: 3587: 3025: 2881: 2840:"Neural Attunement Processes in Infants during the Acquisition of a Language-Specific Phonemic Contrast" 2294: 2015: 1947: 1869: 1720: 1355: 583: 421: 314: 141: 594:. These representations can then be combined for use in word recognition and other language processes. 625:

One linguistic unit can be cued by several acoustic properties. For example, in a classic experiment,

4337: 3830: 2942: 2376: 2266: 2142: 1979: 1833: 1756: 1673: 1351: 1209: 1009: 832:, i.e. it has a negative VOT. Then, increasing the VOT, it reaches zero, i.e. the plosive is a plain 784: 521: 276: 97: 3854: 1279:

in speech, and how speech information is used for higher-level processes, such as word recognition.

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is a phenomenon not specific to speech perception only; it exists in other types of perception too.

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differ depending on the following vowel (see Figure 1) but they are all interpreted as the phoneme

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that define perceptually the consonant differ depending on the identity of the following vowel. (

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Strong version – listening to speech engages specialized speech mechanisms for perceiving speech.

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Neurophysiological methods were introduced into speech perception research for several reasons:

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more traditional, behavioral methods for studying speech perception. Among the new methods (see

945: 3986: 4342: 4319: 4292: 4287: 4272: 4245: 4190: 4158: 4061: 4026: 3938: 3921:

Oden, G.C., Massaro, D.W. (1978). "Integration of featural information in speech perception".

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Aphasia with impaired speech perception typically shows lesions or damage located in the left

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The Acoustics of Speech Communication: Fundamentals, Speech Perception Theory, and Technology

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Some of the earliest work in the study of how humans perceive speech sounds was conducted by

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may interact with basic speech perception processes to aid in recognition of speech sounds.

825: 821: 714: 579: 233: 180: 155: 150: 4057: 4469: 4352: 4297: 4267: 4255: 4220: 4215: 4210: 4195: 2449:"Contributions of semantic and facial information to perception of nonsibilant fricatives" 1777: 1566: 1562: 1415: 1193: 1071: 656: 540: 442: 271: 223: 175: 2067: 937: 603:

extremely difficult to find, even after some forty-five years of research on the problem.

3834: 2946: 2380: 2270: 2146: 1983: 1837: 1760: 1677: 3816:"Toward a model of lexical access based on acoustic landmarks and distinctive features" 3195:"Speech patterns heard early in life influence later perception of the tritone paradox" 2864: 2839: 2544: 2517: 1558: 1459: 1347: 976: 685: 626: 3126: 3001: 2965: 2930: 2764: 2747: 2467: 2176:

Strange, W. (1999). "Perception of vowels: Dynamic constancy". In J.M. Pickett (ed.).

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Liberman, A.M., Cooper, F.S., Shankweiler, D.P., & Studdert-Kennedy, M. (1967).

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Phonetic environment affects the acoustic properties of speech sounds. For example,

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of the event that is perceived. For speech perception, the theory asserts that the

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affects both the expression and reception of language. Both two most common types,

963:. Lexical and semantic difficulties are common, and comprehension may be affected. 837: 727: 365: 329: 4073: 3770: 3766: 3693: 3608: 3538: 3062:

Speech perception and linguistic experience: Theoretical and methodological issues

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Speech perception and linguistic experience: Theoretical and methodological issues

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Hickok G, Poeppel D (May 2007). "The cortical organization of speech processing".

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speech (second-language speech perception). The latter falls within the domain of

883:. Therefore, the process of speech perception is not necessarily uni-directional. 3981:

Neurolinguistics: An Introduction to Spoken Language Processing and its Disorders

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which he defines as "aspects of what an experience is like" for an individual.

4237: 3514: 3497: 3388:"Neurological Evidence in Support of a Specialized Phonetic Processing Module" 2130: 1482: 768: 529: 525: 3213: 2811: 2592: 2534: 1809:

Fowler, C.A. (1995). "Speech production". In J.L. Miller; P.D. Eimas (eds.).

4383: 4368: 4205: 4148: 4135: 2955: 1354:. Using a speech synthesizer, they constructed speech sounds that varied in 1042: 896: 669: 513: 509: 300: 289: 218: 213: 203: 89: 4065: 4044:

Randy L. Diehl; Andrew J. Lotto; Lori L. Holt (2004). "Speech perception".

3850: 3565: 3523: 3468: 3411: 3403: 3134: 3096: 3009: 2974: 2873: 2819: 2681: 2635: 2553: 2485: 2092:

Hay, Jennifer; Drager, Katie (2010). "Stuffed toys and speech perception".

2063: 1853: 35: 4030: 3899: 3758: 3635: 3539:"The discrimination of speech sounds within and across phoneme boundaries" 3307: 2773: 2396: 2286: 2162: 2105: 1999: 1917: 1707:

Halle, M., Mohanan, K.P. (1985). "Segmental phonology of modern English".

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Weak version – listening to speech engages previous knowledge of language.

805:

Figure 4: Example identification (red) and discrimination (blue) functions

4393: 4302: 3942: 2037:"The role of talker-specific information in word segmentation by infants" 1811:

Handbook of Perception and Cognition: Speech, Language, and Communication

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Handbook of Perception and Cognition: Speech, Language, and Communication

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may vary in its acoustic details across different phonetic contexts (see

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suggested that auditory learning begins already in the pre-natal period.

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A large amount of research has studied how users of a language perceive

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Figure 3: The left panel shows the 3 peripheral American English vowels

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The direct realist theory of speech perception (mostly associated with

1118: 971: 560: 411: 401: 319: 208: 3842: 3172: 2569:"Speech Perception: Cognitive Foundations and Cortical Implementation" 2476: 1845: 1768: 4329: 3627: 3557: 2278: 2154: 1991: 1685: 892: 505: 3537:

Liberman, A.M., Harris, K.S., Hoffman, H.S., Griffith, B.C. (1957).

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Journal of Experimental Psychology: Human Perception and Performance

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different category (see the blue discrimination curve in Figure 4).

4098: 3442:"Neural correlates of switching from auditory to speech perception" 3436:; Pallier, C.; Serniclaes, W.; Sprenger-Charolles, L.; Jobert, A.; 578:

categories. For example, one of the most studied cues in speech is

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Although listeners perceive speech as a stream of discrete units (

655: 550: 243: 1891:"Some effects of context on voice onset time in English plosives" 684:

will depend on the production of the following vowel (because of

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on the Perception of Speech. Some articles are freely available.

824:, each new step differs from the preceding one in the amount of 4102: 3193:

Deutsch, Diana; Henthorn, Trevor; Dolson, Mark (Spring 2004).

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which manifests as impairment in speech production. Damage to

29: 3345:"The influence of meaning on the perception of speech sounds" 2929:

Kuhl, Patricia K.; Feng-Ming Tsao; Huei-Mei Liu (July 2003).

2748:"Auditory Agnosia with relative sparing of speech perception" 2367:

Warren, R.M. (1970). "Restoration of missing speech sounds".

2236:. Berkeley and Los Angeles: University of California Press. 1070:

speech (referred to as cross-language speech perception) or

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In an artificial continuum between a voiceless and a voiced

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Minagawa-Kawai, Y., Mori, K., Naoi, N., Kojima, S. (2006).

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The fuzzy logical theory of speech perception developed by

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as a mechanism by which humans can identify speech sounds.

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The Journal of Neuropsychiatry and Clinical Neurosciences

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Loizou, P. (1998). "Introduction to cochlear implants".

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Perception of English /r/ and /l/ by Japanese speakers

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Proc. 6th International Congress of Phonetic Sciences

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are heard, interpreted, and understood. The study of

4003:

Parker, Ellen M.; R.L. Diehl; K.R. Kluender (1986).

2328:. Prague: Academia. pp. 563–567. Archived from 2035:

Houston, Derek M.; Juscyk, Peter W. (October 2000).

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above) underlies the recognition of a speech sound.

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(1985). 478: 27:Process of hearing and understanding language 8: 4005:"Trading Relations in Speech and Non-speech" 3955:: CS1 maint: multiple names: authors list ( 3823:Journal of the Acoustical Society of America 3654:: CS1 maint: multiple names: authors list ( 3592:: CS1 maint: multiple names: authors list ( 3371:: CS1 maint: multiple names: authors list ( 3077:Journal of the American Academy of Audiology 3030:: CS1 maint: multiple names: authors list ( 2886:: CS1 maint: multiple names: authors list ( 2516:Cervantes Constantino, F; Simon, JZ (2018). 2432:: CS1 maint: multiple names: authors list ( 2352:: CS1 maint: multiple names: authors list ( 2299:: CS1 maint: multiple names: authors list ( 2259:Journal of the Acoustical Society of America 2198:"Speaker Normalization in speech perception" 2135:Journal of the Acoustical Society of America 2020:: CS1 maint: multiple names: authors list ( 1972:Journal of the Acoustical Society of America 1952:: CS1 maint: multiple names: authors list ( 1874:: CS1 maint: multiple names: authors list ( 1826:Journal of the Acoustical Society of America 1749:Journal of the Acoustical Society of America 1725:: CS1 maint: multiple names: authors list ( 1666:Journal of the Acoustical Society of America 1649:: CS1 maint: multiple names: authors list ( 721:Variation due to differing speech conditions 3279:McClelland, J.L. & Elman, J.L. 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Needham Heights (MA): Allyn & Bacon. 1557:) is a part of the more general theory of 1232:stimuli after being taught Japanese, this 534:computer systems that can recognize speech 485: 471: 390: 296: 137: 76: 4020: 3998: 3996: 3972: 3970: 3968: 3966: 3740: 3513: 2964: 2954: 2863: 2763: 2543: 2533: 2475: 1776: 709:in English is fronted when surrounded by 3715: 3713: 2833: 2831: 2829: 1522:Two versions of speech mode hypothesis: 1381:To provide a theoretical account of the 60:of all important aspects of the article. 3801:Experimental Phonetics: An Introduction 2191: 2189: 2187: 1620: 1571: 1463: 1446: 1324: 1184:Research into the relationship between 646:Linearity and the segmentation problem 429: 382: 352: 299: 288: 251: 193: 140: 129: 103: 88: 4058:10.1146/annurev.psych.55.090902.142028 3948: 3794: 3792: 3790: 3647: 3585: 3364: 3281:"The TRACE model of speech perception" 3023: 2906:The Cambridge Encyclopedia of Language 2879: 2425: 2345: 2292: 2013: 1965: 1963: 1945: 1867: 1718: 1642: 747:Perceptual constancy and normalization 500:is the process by which the sounds of 56:Please consider expanding the lead to 3671:"The grammars of speech and language" 3243: 3241: 3239: 2899: 2897: 2655: 2653: 2312: 2310: 2203:. In Pisoni, D.B.; Remez, R. (eds.). 2125: 2123: 1804: 1802: 1047: 952:where speech processing is impaired. 7: 3386:Gocken, J.M. & Fox R.A. (2001). 3354:. Vol. 30. pp. 11381–11386 1630: 1628: 1626: 1624: 1590:Neurocomputational speech processing 2317:Lisker, L., Abramson, A.S. (1970). 1889:Lisker, L., Abramson, A.S. (1967). 1300:. One important response used with 1236:individual would have an extremely 3546:Journal of Experimental Psychology 2662:Clinical Linguistics and Phonetics 1391: 1062:Cross-language and second-language 844:in 1970. The sounds they used are 25: 2522:Frontiers in Systems Neuroscience 2205:The Handbook of Speech Perception 1610:Motor theory of speech perception 1481:This theory thus posits that the 1342:Motor theory of speech perception 1105:In language or hearing impairment 3461:10.1016/j.neuroimage.2004.09.039 3266:10.1111/j.1533-6077.2010.00186.x 2804:10.1176/appi.neuropsych.14040073 2585:10.1111/j.1467-8721.2008.00553.x 1466:is simply claimed not to exist. 1440:proposed acoustic landmarks and 1133:Listeners with cochlear implants 34: 3609:"Perception of the speech code" 3161:IEEE Signal Processing Magazine 2729:"Welcome to Brain and Language" 1180:Cognitive neuroscience of music 48:may be too short to adequately 2856:10.1523/JNEUROSCI.1984-06.2007 2422:. Innsbruck. pp. 285–293. 2207:. Oxford: Blackwell Publishers 1778:11858/00-001M-0000-002C-5789-A 940:of the brain often results in 58:provide an accessible overview 1: 3127:10.1016/S0028-3932(01)00052-5 3002:10.1016/S0010-0277(02)00198-1 2765:10.1016/s0010-9452(89)80007-3 2733:Welcome to Brain and Language 1583:Related to the case study of 1008:Infants begin the process of 852:and the last three sounds as 780: 629:(1957) showed that the onset 430:Theories of speech perception 4283:Perception as interpretation 4092:Philosophical Transactions B 3892:10.1016/0010-0285(89)90014-5 3751:10.1016/0010-0277(85)90021-6 3690:10.1016/0010-0285(70)90018-6 3300:10.1016/0010-0285(86)90015-0 2674:10.3109/02699206.2010.507297 2389:10.1126/science.167.3917.392 1813:. San Diego: Academic Press. 1639:. San Diego: Academic Press. 1169:Auditory processing disorder 1150:Auditory processing disorder 931:Aphasia is an impairment of 911:Acquired language impairment 869:Auditory processing disorder 4046:Annual Review of Psychology 3977:Ingram, John. C.L. (2007). 3248:O'Callaghan, Casey (2010). 2844:The Journal of Neuroscience 2468:10.1044/1092-4388(2003/106) 2056:10.1037/0096-1523.26.5.1570 1076:second language acquisition 1054:is widely used in infants. 881:phonemic restoration effect 813:categories (phonemes) than 4486: 3935:10.1037/0033-295X.85.3.172 1910:10.1177/002383096701000101 1413: 1339: 1298:near infrared spectroscopy 1283:Neurophysiological methods 1177: 1166: 1147: 1143:Critical period hypothesis 1052:near-infrared spectroscopy 866: 794: 739:the resonant frequencies ( 649: 3799:Hayward, Katrina (2000). 3515:10.1111/1469-8986.3810001 2456:J. Speech Lang. Hear. Res 1605:Speech-Language Pathology 1174:Music-language connection 1019:Thai has three categories 701:Context-induced variation 4445:Developmental psychology 3214:10.1525/mp.2004.21.3.357 2535:10.3389/fnsys.2018.00056 1595:Multisensory integration 1302:event-related potentials 1290:event-related potentials 1205:The experience of speech 1004:Infant speech perception 417:Neural encoding of sound 4404:Relational frame theory 4379:Higher nervous activity 3669:Liberman, A.M. (1970). 2956:10.1073/pnas.1532872100 2904:Crystal, David (2005). 2708:www.merriam-webster.com 2704:"Definition of AGNOSIA" 2232:Principles of phonology 1740:Liberman, A.M. (1957). 1358:along a continuum from 921:inferior temporal gyrus 828:. The first sound is a 588:manners of articulation 195:Manners of articulation 4374:Experiential avoidance 3814:Stevens, K.N. (2002). 3404:10.1006/brln.2001.2467 2727:Howard, Harry (2017). 2226:Trubetzkoy, Nikolay S. 1539:categorical perception 1511:Speech mode hypothesis 1383:categorical perception 1372:categorical perception 1350:and his colleagues at 1320: 1294:magnetoencephalography 1114:Listeners with aphasia 806: 797:Categorical perception 791:Categorical perception 772: 661: 606: 584:places of articulation 564: 407:Categorical perception 142:Places of articulation 4389:Ironic process theory 4154:Cognitive flexibility 3496:Näätänen, R. (2001). 3250:"Experiencing Speech" 2106:10.1515/LING.2010.027 1978:(5 Pt 1): 3099–3111. 1567:objects of perception 1549:Direct realist theory 1356:place of articulation 1313: 1274:Computational methods 1138:Cochlear implantation 804: 754: 659: 599: 554: 315:Fundamental frequency 3923:Psychological Review 3880:Cognitive Psychology 3678:Cognitive Psychology 3616:Psychological Review 3434:Dehaene-Lambertz, G. 3288:Cognitive Psychology 3254:Philosophical Issues 2746:Lambert, J. (1999). 2196:Johnson, K. (2005). 1442:distinctive features 1352:Haskins Laboratories 1200:Speech phenomenology 1027:statistical learning 1010:language acquisition 785:Perceptual constancy 522:cognitive psychology 335:Source–filter theory 253:Airstream mechanisms 18:Speech comprehension 4419:Thought suppression 4090:Dedicated issue of 3835:2002ASAJ..111.1872S 3089:10.3766/jaaa.22.3.2 2947:2003PNAS..100.9096K 2381:1970Sci...167..392W 2271:1995ASAJ...97..553I 2147:1986ASAJ...79.1086S 1984:1995ASAJ...97.3099H 1898:Language and Speech 1838:2001ASAJ..109..748H 1761:1957ASAJ...29..117L 1678:1976ASAJ...59.1208K 1585:Genie (feral child) 1489:Fuzzy-logical model 1306:mismatch negativity 1259:discrimination test 1218:phenomenal features 1214:Experiencing Speech 1186:music and cognition 933:language processing 874:Top-down influences 652:Speech segmentation 631:formant transitions 557:formant transitions 4022:10.3758/bf03211495 3803:. Harlow: Longman. 3392:Brain and Language 2908:. Cambridge: CUP. 2616:Nat. Rev. Neurosci 1709:Linguistic Inquiry 1572:lack of invariance 1535:dichotic listening 1517:modularity of mind 1464:lack of invariance 1447:lack of invariance 1438:Kenneth N. Stevens 1386:English consonant 1325:lack of invariance 1252:Behavioral methods 1123:expressive aphasia 942:expressive aphasia 807: 773: 711:coronal consonants 692:Lack of invariance 662: 565: 461:Linguistics portal 438:Acoustic landmarks 98:Linguistics Series 4432: 4431: 4191:Critical thinking 4159:Cognitive liberty 3843:10.1121/1.1458026 3173:10.1109/79.708543 3121:(11): 1194–1208. 2941:(15): 9096–9101. 2915:978-0-521-55967-6 2375:(3917): 392–393. 2243:978-0-520-01535-7 1846:10.1121/1.1337959 1769:10.1121/1.1908635 1645:cite encyclopedia 1543:duplex perception 1212:, in his article 1210:Casey O'Callaghan 1127:receptive aphasia 1084:liquid consonants 950:receptive aphasia 948:often results in 917:receptive aphasia 614:American English 498:Speech perception 495: 494: 455: 454: 378: 377: 284: 283: 75: 74: 16:(Redirected from 4477: 4129:Mental processes 4123: 4116: 4109: 4100: 4078: 4077: 4041: 4035: 4034: 4024: 4000: 3991: 3990: 3984: 3974: 3961: 3960: 3954: 3946: 3918: 3912: 3911: 3875: 3869: 3868: 3866: 3865: 3859: 3853:. 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Archived from 2050:(5): 1570–1582. 2041: 2032: 2026: 2025: 2019: 2011: 1992:10.1121/1.411872 1967: 1958: 1957: 1951: 1943: 1941: 1940: 1934: 1928:. Archived from 1895: 1886: 1880: 1879: 1873: 1865: 1821: 1815: 1814: 1806: 1797: 1796: 1794: 1793: 1787: 1781:. Archived from 1780: 1746: 1737: 1731: 1730: 1724: 1716: 1704: 1698: 1697: 1686:10.1121/1.380986 1672:(5): 1208–1221. 1661: 1655: 1654: 1648: 1640: 1632: 1600:Origin of speech 1397: 1389: 1369: 1365: 1361: 1244:Research methods 1092: 1088: 1048:Research methods 855: 851: 846:available online 822:bilabial plosive 766: 762: 758: 715:voice onset time 708: 683: 640: 636: 621: 617: 580:voice onset time 487: 480: 473: 391: 297: 138: 77: 70: 67: 61: 38: 30: 21: 4485: 4484: 4480: 4479: 4478: 4476: 4475: 4474: 4465:Psychoacoustics 4435: 4434: 4433: 4428: 4357: 4324: 4232: 4211:Problem solving 4196:Decision-making 4130: 4127: 4086: 4081: 4043: 4042: 4038: 4002: 4001: 3994: 3976: 3975: 3964: 3947: 3920: 3919: 3915: 3877: 3876: 3872: 3863: 3861: 3857: 3818: 3813: 3812: 3808: 3798: 3797: 3788: 3779: 3777: 3773: 3724: 3719: 3718: 3711: 3702: 3700: 3696: 3673: 3668: 3667: 3663: 3646: 3640: 3638: 3611: 3606: 3605: 3601: 3584: 3578: 3576: 3541: 3536: 3535: 3531: 3495: 3494: 3490: 3481: 3479: 3444: 3432: 3431: 3427: 3385: 3384: 3380: 3367:cite conference 3363: 3357: 3355: 3347: 3342: 3341: 3337: 3328: 3326: 3322: 3283: 3278: 3277: 3273: 3247: 3246: 3237: 3232: 3228: 3218: 3216: 3197: 3192: 3191: 3180: 3167:(11): 101–130. 3158: 3157: 3150: 3112: 3111: 3104: 3074: 3073: 3069: 3059: 3058: 3054: 3044: 3043: 3039: 3022: 2987: 2986: 2982: 2928: 2927: 2923: 2916: 2903: 2902: 2895: 2878: 2837: 2836: 2827: 2789: 2788: 2781: 2745: 2744: 2740: 2726: 2725: 2721: 2712: 2710: 2702: 2701: 2697: 2668:(12): 980–996. 2659: 2658: 2651: 2628:10.1038/nrn2113 2613: 2612: 2608: 2566: 2565: 2561: 2515: 2514: 2507: 2498: 2496: 2492: 2451: 2446: 2445: 2441: 2428:cite conference 2424: 2417: 2416: 2412: 2366: 2365: 2361: 2348:cite conference 2344: 2338: 2336: 2332: 2321: 2316: 2315: 2308: 2291: 2256: 2255: 2251: 2244: 2224: 2223: 2219: 2210: 2208: 2200: 2195: 2194: 2185: 2175: 2174: 2170: 2129: 2128: 2121: 2091: 2090: 2086: 2076: 2074: 2070: 2039: 2034: 2033: 2029: 2012: 1969: 1968: 1961: 1944: 1938: 1936: 1932: 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4265: 4260: 4259: 4258: 4248: 4242: 4240: 4234: 4233: 4231: 4230: 4225: 4224: 4223: 4218: 4208: 4203: 4198: 4193: 4188: 4183: 4178: 4173: 4172: 4171: 4161: 4156: 4151: 4146: 4140: 4138: 4132: 4131: 4128: 4126: 4125: 4118: 4111: 4103: 4097: 4096: 4085: 4084:External links 4082: 4080: 4079: 4052:(1): 149–179. 4036: 4015:(2): 129–142. 3992: 3962: 3929:(3): 172–191. 3913: 3886:(3): 398–421. 3870: 3806: 3786: 3742:10.1.1.330.220 3709: 3684:(4): 301–323. 3661: 3622:(6): 431–461. 3599: 3552:(5): 358–368. 3529: 3488: 3425: 3398:(2): 241–253. 3378: 3335: 3271: 3235: 3226: 3178: 3148: 3102: 3083:(3): 129–142. 3067: 3052: 3037: 2996:(1): B47–B57. 2980: 2921: 2914: 2893: 2850:(2): 315–321. 2825: 2779: 2738: 2719: 2695: 2649: 2622:(5): 393–402. 2606: 2559: 2505: 2462:(6): 1367–77. 2439: 2410: 2359: 2306: 2265:(1): 553–562. 2249: 2242: 2217: 2183: 2168: 2119: 2100:(4): 865–892. 2084: 2027: 1959: 1881: 1832:(2): 748–763. 1816: 1798: 1755:(1): 117–123. 1732: 1699: 1656: 1619: 1617: 1614: 1613: 1612: 1607: 1602: 1597: 1592: 1587: 1579: 1576: 1559:direct realism 1550: 1547: 1531: 1530: 1527: 1512: 1509: 1490: 1487: 1460:coarticulation 1434: 1431: 1414:Main article: 1411: 1408: 1348:Alvin Liberman 1340:Main article: 1337: 1334: 1332: 1329: 1317:distributions. 1284: 1281: 1275: 1272: 1266: 1263: 1253: 1250: 1245: 1242: 1206: 1203: 1201: 1198: 1175: 1172: 1156: 1153: 1134: 1131: 1115: 1112: 1106: 1103: 1063: 1060: 1005: 1002: 987:Speech agnosia 977:speech agnosia 968: 965: 961:parietal lobes 928: 925: 912: 909: 875: 872: 864:cues as well. 795:Main article: 792: 789: 748: 745: 735: 732: 728:speaking tempo 722: 719: 702: 699: 693: 690: 686:coarticulation 650:Main article: 647: 644: 643: 642: 627:Alvin Liberman 623: 548: 545: 493: 492: 490: 489: 482: 475: 467: 464: 463: 457: 456: 453: 452: 451: 450: 445: 440: 432: 431: 427: 426: 425: 424: 419: 414: 409: 404: 399: 387: 386: 380: 379: 376: 375: 374: 373: 368: 363: 355: 354: 350: 349: 348: 347: 342: 337: 332: 327: 322: 317: 309: 308: 293: 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4194: 4192: 4189: 4187: 4186:Consciousness 4184: 4182: 4181:Comprehension 4179: 4177: 4174: 4170: 4167: 4166: 4165: 4162: 4160: 4157: 4155: 4152: 4150: 4147: 4145: 4142: 4141: 4139: 4137: 4133: 4124: 4119: 4117: 4112: 4110: 4105: 4104: 4101: 4095: 4093: 4088: 4087: 4083: 4075: 4071: 4067: 4063: 4059: 4055: 4051: 4047: 4040: 4037: 4032: 4028: 4023: 4018: 4014: 4010: 4006: 3999: 3997: 3993: 3988: 3983: 3982: 3973: 3971: 3969: 3967: 3963: 3958: 3952: 3944: 3940: 3936: 3932: 3928: 3924: 3917: 3914: 3909: 3905: 3901: 3897: 3893: 3889: 3885: 3881: 3874: 3871: 3860:on 2007-06-09 3856: 3852: 3848: 3844: 3840: 3836: 3832: 3828: 3824: 3817: 3810: 3807: 3802: 3795: 3793: 3791: 3787: 3776:on 2021-04-15 3772: 3768: 3764: 3760: 3756: 3752: 3748: 3743: 3738: 3734: 3730: 3723: 3716: 3714: 3710: 3699:on 2015-12-31 3695: 3691: 3687: 3683: 3679: 3672: 3665: 3662: 3657: 3651: 3637: 3633: 3629: 3625: 3621: 3617: 3610: 3603: 3600: 3595: 3589: 3575: 3571: 3567: 3563: 3559: 3555: 3551: 3547: 3540: 3533: 3530: 3525: 3521: 3516: 3511: 3507: 3503: 3499: 3492: 3489: 3478: 3474: 3470: 3466: 3462: 3458: 3454: 3450: 3443: 3439: 3435: 3429: 3426: 3421: 3417: 3413: 3409: 3405: 3401: 3397: 3393: 3389: 3382: 3379: 3374: 3368: 3353: 3346: 3339: 3336: 3325:on 2007-04-21 3321: 3317: 3313: 3309: 3305: 3301: 3297: 3293: 3289: 3282: 3275: 3272: 3267: 3263: 3259: 3255: 3251: 3244: 3242: 3240: 3236: 3230: 3227: 3215: 3211: 3208:(3): 357–72. 3207: 3203: 3196: 3189: 3187: 3185: 3183: 3179: 3174: 3170: 3166: 3162: 3155: 3153: 3149: 3144: 3140: 3136: 3132: 3128: 3124: 3120: 3116: 3109: 3107: 3103: 3098: 3094: 3090: 3086: 3082: 3078: 3071: 3068: 3063: 3056: 3053: 3048: 3041: 3038: 3033: 3027: 3019: 3015: 3011: 3007: 3003: 2999: 2995: 2991: 2984: 2981: 2976: 2972: 2967: 2962: 2957: 2952: 2948: 2944: 2940: 2936: 2932: 2925: 2922: 2917: 2911: 2907: 2900: 2898: 2894: 2889: 2883: 2875: 2871: 2866: 2861: 2857: 2853: 2849: 2845: 2841: 2834: 2832: 2830: 2826: 2821: 2817: 2813: 2809: 2805: 2801: 2797: 2793: 2786: 2784: 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2023: 2017: 2009: 2005: 2001: 1997: 1993: 1989: 1985: 1981: 1977: 1973: 1966: 1964: 1960: 1955: 1949: 1935:on 2016-03-03 1931: 1927: 1923: 1919: 1915: 1911: 1907: 1903: 1899: 1892: 1885: 1882: 1877: 1871: 1863: 1859: 1855: 1851: 1847: 1843: 1839: 1835: 1831: 1827: 1820: 1817: 1812: 1805: 1803: 1799: 1788:on 2016-03-03 1784: 1779: 1774: 1770: 1766: 1762: 1758: 1754: 1750: 1743: 1736: 1733: 1728: 1722: 1714: 1710: 1703: 1700: 1695: 1691: 1687: 1683: 1679: 1675: 1671: 1667: 1660: 1657: 1652: 1646: 1638: 1631: 1629: 1627: 1625: 1621: 1615: 1611: 1608: 1606: 1603: 1601: 1598: 1596: 1593: 1591: 1588: 1586: 1582: 1581: 1577: 1575: 1573: 1568: 1564: 1563:distal source 1560: 1556: 1548: 1546: 1544: 1540: 1536: 1528: 1525: 1524: 1523: 1520: 1518: 1510: 1508: 1506: 1505:McGurk effect 1501: 1496: 1488: 1486: 1484: 1483:distal object 1479: 1475: 1471: 1467: 1465: 1461: 1456: 1451: 1448: 1443: 1439: 1432: 1430: 1426: 1422: 1417: 1409: 1407: 1406:information. 1403: 1401: 1393: 1384: 1379: 1375: 1373: 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573: 569: 568:Acoustic cues 562: 558: 553: 547:Acoustic cues 546: 544: 542: 537: 535: 531: 527: 523: 519: 515: 511: 507: 503: 499: 488: 483: 481: 476: 474: 469: 468: 466: 465: 462: 459: 458: 449: 446: 444: 441: 439: 436: 435: 434: 433: 428: 423: 420: 418: 415: 413: 410: 408: 405: 403: 400: 398: 397:Acoustic cues 395: 394: 393: 392: 389: 388: 385: 381: 372: 369: 367: 364: 362: 359: 358: 357: 356: 351: 346: 345:Voicelessness 343: 341: 338: 336: 333: 331: 328: 326: 323: 321: 318: 316: 313: 312: 311: 310: 306: 302: 298: 295: 294: 291: 287: 278: 275: 273: 270: 268: 265: 263: 260: 259: 258: 257: 254: 250: 245: 242: 240: 237: 235: 232: 230: 227: 225: 222: 220: 217: 215: 212: 210: 207: 205: 202: 201: 200: 199: 196: 192: 187: 184: 182: 179: 177: 174: 172: 169: 167: 164: 162: 159: 157: 154: 152: 149: 148: 147: 146: 143: 139: 136: 135: 132: 128: 123: 120: 118: 115: 113: 110: 109: 108: 107: 102: 99: 95: 94: 91: 87: 83: 79: 78: 69: 59: 53: 51: 46: 41: 37: 32: 31: 19: 4312: 4091: 4049: 4045: 4039: 4012: 4008: 3980: 3951:cite journal 3926: 3922: 3916: 3883: 3879: 3873: 3862:. Retrieved 3855:the original 3826: 3822: 3809: 3800: 3778:. Retrieved 3771:the original 3732: 3728: 3701:. Retrieved 3694:the original 3681: 3677: 3664: 3650:cite journal 3639:. Retrieved 3619: 3615: 3602: 3588:cite journal 3577:. Retrieved 3549: 3545: 3532: 3505: 3501: 3491: 3480:. Retrieved 3455:(1): 21–33. 3452: 3448: 3428: 3395: 3391: 3381: 3356:. Retrieved 3351: 3338: 3327:. Retrieved 3320:the original 3291: 3287: 3274: 3257: 3253: 3229: 3217:. Retrieved 3205: 3201: 3164: 3160: 3118: 3114: 3080: 3076: 3070: 3061: 3055: 3046: 3040: 3026:cite journal 2993: 2989: 2983: 2938: 2934: 2924: 2905: 2882:cite journal 2847: 2843: 2795: 2791: 2758:(5): 71–82. 2755: 2751: 2741: 2732: 2722: 2711:. Retrieved 2707: 2698: 2665: 2661: 2619: 2615: 2609: 2579:(2): 80–85. 2576: 2572: 2562: 2525: 2521: 2497:. Retrieved 2490:the original 2459: 2455: 2442: 2419: 2413: 2372: 2368: 2362: 2337:. Retrieved 2330:the original 2325: 2295:cite journal 2262: 2258: 2252: 2231: 2220: 2209:. Retrieved 2204: 2177: 2171: 2138: 2134: 2131:Syrdal, A.K. 2097: 2093: 2087: 2075:. Retrieved 2068:the original 2047: 2043: 2030: 2016:cite journal 1975: 1971: 1948:cite journal 1937:. Retrieved 1930:the original 1901: 1897: 1884: 1870:cite journal 1829: 1825: 1819: 1810: 1790:. Retrieved 1783:the original 1752: 1748: 1735: 1721:cite journal 1715:(1): 57–116. 1712: 1708: 1702: 1669: 1665: 1659: 1636: 1555:Carol Fowler 1552: 1532: 1521: 1514: 1492: 1480: 1476: 1472: 1468: 1452: 1436: 1427: 1423: 1419: 1404: 1380: 1376: 1345: 1336:Motor theory 1321: 1315: 1314: 1310: 1286: 1277: 1268: 1255: 1247: 1240:experience. 1237: 1233: 1229: 1226: 1222: 1217: 1213: 1208: 1191: 1183: 1158: 1136: 1117: 1108: 1099: 1080: 1065: 1056: 1039: 1035: 1007: 992: 991: 986: 985: 970: 954: 938:Broca's area 930: 914: 901: 885: 877: 862: 858: 819: 814: 810: 808: 778: 774: 737: 724: 704: 695: 678: 663: 607: 601: 600: 596: 572:sensory cues 567: 566: 538: 497: 496: 448:Motor theory 383: 330:Pitch accent 166:Postalveolar 131:Articulation 117:Articulatory 96:Part of the 66:January 2021 63: 47: 45:lead section 4228:Prospection 4201:Imagination 4164:Forecasting 4144:Association 3735:(1): 1–36. 3508:(1): 1–21. 3438:Dehaene, S. 3294:(1): 1–86. 3260:: 305–327. 2094:Linguistics 1904:(1): 1–28. 1394:), yet all 1023:categorical 997:Phonagnosia 993:Phonagnosia 981:phonagnosia 834:unaspirated 726:changes in 518:linguistics 229:Approximant 4439:Categories 4409:Mental set 4288:Peripheral 4238:Perception 4221:strategies 3864:2007-05-17 3780:2007-07-19 3703:2007-07-19 3641:2007-05-19 3579:2007-05-18 3482:2007-07-04 3449:NeuroImage 3358:2007-05-19 3329:2007-05-19 2713:2017-12-15 2528:(56): 56. 2499:2017-09-14 2477:1808/13411 2339:2007-05-17 2211:2007-05-17 1939:2007-05-17 1792:2007-05-17 1616:References 1400:modularity 1178:See also: 1167:See also: 1148:See also: 1043:habituated 1017:, whereas 889:morphology 867:See also: 830:pre-voiced 713:. 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