Knowledge (XXG)

Purr

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result) and non-solicitation purrs, and the two are distinguishable to humans. In a study, 50 humans were subjected to playbacks of purrs recorded in solicitation and non-solicitation situations at the same amplitude. Humans regularly judged the solicitation purrs as less pleasant and more urgent than the non-solicitation purrs. This variety of purring seems to be found more frequently in cats in a one-to-one relationship with a caretaker. Similarities have been drawn between an infant's cry and the isolation cry of domestic cats. The high-frequency aspect of the purr may subtly exploit humans' sensitivity to these cries. Using sensory biases in communication between species provides cats with a productive means of improving the care that they receive.
43: 2194: 247:" in the cat's brain of uncertain significance. Although the mechanism has not yet been fully explained, recent studies have inferred it could be the result of oscillatory mechanisms in the central nervous system.  Studies have also shown that purring can be caused through electrically stimulating the infundibular region of the cat's brain, suggesting central control. 385:
Eklund & Peters compared purring in adult, subadult and juvenile cheetahs and reported that while there was considerable variation across most of the parameters analyzed (amplitude, phase duration, cycles per phase and fundamental frequency) – mainly attributable to degree of relaxation/agitation
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Cats have been shown to have different types of purrs depending on situations. For example, purring appears to be a way for cats to signal their caretakers for food. This purring has a high-frequency component not present in other purrs. These are called solicitation purrs (when the cat is seeking a
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of around 25 Hz. This sound occurs with noticeable vibrations on the surface of the body, varies in a rhythmic pattern during breathing and occurs continuously during inhalation and exhalation. The intensity and length of the purr can also vary depending on the level of arousal of the animal.
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Schötz & Eklund studied purring in four domestic cats and found that the fundamental frequency varied between 20.94 and 27.21 Hz for egressive phases and between 23.0 and 26.09 Hz for ingressive phases. Schötz & Eklund also observed considerable variation between the four cats as
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In a follow-up study of purring in four adult cheetahs, Eklund, Peters, Weise & Munro found that egressive phases were longer than ingressive phases in all four cheetahs. Likewise, ingressive phases had a lower frequency than egressive phases in all four cheetahs. Mean frequency were between
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In domestic cats, many signals that occur when interacting with humans seem to originate from when the animal was dependent on the mother. Cats have been observed to purr for most of their lifespan, starting from when they were young and suckling from their mother. Purring may be a signaling
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All remaining species of the family Felidae ("purring cats") have a completely ossified hyoid, which enables them to purr but not to roar. Based on a technical acoustic definition of roaring, the presence of this vocalization type depends on specific characteristics of the vocal folds and an
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This sound is made when a guinea pig is content, examples of this include when it is being petted or held, when groomed, investigating a new place, or given food. It is neither continuous nor does it correspond to respiration, and thus is not a true
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Animals purr for a variety of reasons, including to express happiness or fear, and as a defense mechanism. It has also been shown that cats purr to manage pain and soothe themselves. Purring is a soft buzzing sound, similar to a rolled 'r' with a
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in the animals resting or playing– previously reported observations that ingressive phases tend to be lower in frequency were largely confirmed. There were no major differences in these parameters as a function of age.
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The mechanism by which cats purr is an object of speculation, with different hypotheses proposed. An early idea was that purring is a hemodynamic process where sound is produced as the blood runs through the thorax.
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kittens. Post-nursing cats often purr as a sign of contentment when being petted, becoming relaxed or eating. Some purring may be a signal to another animal that the purring cat does not pose a threat.
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19.3 Hz and 20.5 Hz in ingressive phases, and between 21.9 Hz and 23.4 Hz in egressive phases. Moreover, the amplitude was louder in the egressive phases in four cheetahs.
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rapidly, causing air vibrations during inhalation and exhalation. Combined with the steady inhalation and exhalation of air as the cat breathes, a purring noise is produced with strong
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and the cat begins to purr, which is hypothesized to be a self-relaxation technique. This purring may trigger a cat's brain to release a hormone that helps it relax and acts as a
823:"Hyoid apparatus and pharynx in the lion (Panthera leo), jaguar (Panthera onca), tiger (Panthera tigris), cheetah (Acinonyx jubatus) and domestic cat (Felis silvestris f. catus)" 175:. It varies in loudness and tone among species and in the same animal. In smaller and domestic cats it is known as a purr, while in larger felids, such as the 745: 78: 378:
regards relative amplitude, duration and frequency between egressive and ingressive phases, but that this variation occurred within the same general range.
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phases), while the much smaller domestic cat purred with an average frequency of 21.98 Hz (egressive phases) and 23.24 Hz (ingressive phases).
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Reprinted in: Voith VL, Borchelt PL (eds). Readings in Companion Animal Behavior. Trenton: Veterinary Learning Systems, 1996; 269–270.
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Stogdale L, Delack JB. Feline purring. Compendium on Continuing Education for the Practicing Veterinarian 1985; 7: 551–553.
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produce vocalizations that sound similar to true purring. Animals that produce purr-like sounds include
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An acoustic analysis of purring in the cheetah (Acinonyx jubatus) and in the domestic cat (Felis catus)
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Proceedings of Fonetik 2013, the XXVIth Swedish Phonetics Conference, Studies in Language and Culture
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Remmers, J. E.; Gautier, H. (1 December 1972). "Neural and mechanical mechanisms of feline purring".
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Weissengruber, G. E.; Forstenpointner, G.; Peters, G.; Kubber-Heiss, A.; Fitch, W. T. (2002).
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McComb, Karen; Taylor, Anna M.; Wilson, Christian; Charlton, Benjamin D. (14 July 2009).
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elongated vocal tract, which is rendered possible by an incompletely ossified hyoid.
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A comparative acoustic analysis of purring in juvenile, subadult and adult cheetahs
327: 931:, 8–10 June 2011, Royal Institute of Technology, Stockholm, Sweden, pp. 9–12. 119: 98: 77: 59: 1990: 1892: 1837: 1832: 1797: 1787: 1692: 1677: 1647: 1485: 1470: 1398: 1388: 1264: 1221: 1184: 948:, 30 May–1 June 2012, Gothenburg University, Gothenburg, Sweden, pp. 41–44. 292: 260: 167: 408:
Cats often purr when distressed or in pain, such as during the three stages of
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Owen, Richard (1834). "On the Anatomy of the Cheetah, Felis jubata, Schreb".
707: 664: 550: 479: 412:. In the first stage, the uterus begins to contract, the cervix relaxes, the 1807: 1802: 1687: 1667: 1662: 1445: 1236: 1226: 1194: 397: 367: 366:) found that the cheetah purred with an average frequency of 20.87 Hz ( 352: 272: 195: 187: 1043: 856: 699: 686:
Gibbs, E. L.; Gibbs, F. A. (1936). "A purring center in the cat's brain".
672: 338:), as the fifth felid species with an incompletely ossified hyoid, purrs. 2020: 2015: 1942: 1867: 1762: 1652: 1480: 1413: 1403: 1269: 1209: 521:
Sissom, Dawn E. Frazer; Rice, D. A.; Peters, G. (1991). "How cats purr".
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Schötz, Susanne; van de Weijer, Joost; Eklund, Robert (29 August 2019).
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Eklund, Robert, Gustav Peters, Florian Weise & Stuart Munro. 2012.
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Peters, G. (2002). "Purring and similar vocalizations in mammals".
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Eklund, Robert, Gustav Peters & Elizabeth D. Duthie. 2010.
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Eklund, Peters & Duthie, comparing purring in a cheetah (
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studies, is that cats produce the purring noise by using the
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A comparative acoustic analysis of purring in four cheetahs
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Different cats can sound somewhat different when purring.
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A comparative acoustic analysis of purring in four cats
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is incompletely ("roarers") or completely ("purrers")
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The Transactions of the Zoological Society of London
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is a tonal fluttering sound made by some species of
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Wensing in 1595: 1160: 1146: 1138: 957:Eklund, Robert & Gustav Peters. 2013. 1025: 883: 846: 581: 491: 489: 267:to alternately dilate and constrict the 446: 113:Guinea pig producing purring-like sound 1521:Associazione Nazionale Felina Italiana 796:Annals and Magazine of Natural History 730:Textbook of Veterinary Anatomy 3rd Ed. 600: 589: 182:Although true purring is exclusive to 135: 995: 993: 991: 7: 516: 514: 1546:Governing Council of the Cat Fancy 1002:"The cry embedded within the purr" 777:10.1111/j.1096-3642.1835.tb00611.x 543:10.1111/j.1469-7998.1991.tb04749.x 355:of 20 to 30 vibrations per second. 291:) on one hand and "roaring cats" ( 136:Problems playing these files? See 25: 2006:Congenital sensorineural deafness 1561:The International Cat Association 1516:American Cat Fanciers Association 985:, ISSN 1403-2570, pp. 25–28. 157:, including both larger, outdoor 2193: 2192: 1541:FĂ©dĂ©ration Internationale FĂ©line 1108:10.1046/j.1365-2907.2002.00113.x 839:10.1046/j.1469-7580.2002.00088.x 688:Journal of Comparative Neurology 472:10.1046/j.1365-2907.2002.00113.x 117: 96: 75: 71:A different domestic cat purring 57: 583:10.7287/peerj.preprints.27926v1 735:, Saunders, Philadelphia; p156 1: 251:Vocal folds/laryngeal muscles 171:), as well as two species of 1133:Robert Eklund's Purring Page 657:10.1016/0034-5687(72)90064-3 279:Degree of hyoid ossification 2175:List of longest-living cats 2056:Lower urinary tract disease 2036:Hypertrophic cardiomyopathy 1556:Southern Africa Cat Council 946:Proceedings of Fonetik 2012 929:Proceedings of Fonetik 2011 912:Proceedings of Fonetik 2010 619:"Why and how do cats purr?" 370:phases) and 18.32 Hz ( 2245: 1531:Cat Aficionado Association 310:The "roaring cats" (lion, 255:One hypothesis, backed by 29: 2188: 2011:Feline corneal sequestrum 1536:Cat Fanciers' Association 1027:10.1016/j.cub.2009.05.033 808:10.1080/00222931608693839 283:No cat can both purr and 1526:Canadian Cat Association 351:Domestic cats purr at a 190:, other animals such as 179:, it is called a whirr. 2170:List of individual cats 870:Hemmer, Helmut (1972). 497:"What Makes A Cat Purr" 27:Fluttering vocalization 2046:Infectious peritonitis 2041:Immunodeficiency virus 645:Respiration Physiology 599:Cite journal requires 362:) and a domestic cat ( 263:or the muscles of the 53:A domestic cat purring 46: 2111:Viral rhinotracheitis 2086:Tritrichomonas foetus 1551:New Zealand Cat Fancy 1419:Cats in ancient Egypt 790:Pocock, R.I. (1916). 700:10.1002/cne.900640203 228:fundamental frequency 45: 32:Purr (disambiguation) 1673:Colorpoint Shorthair 1571:World Cat Federation 1305:Cat–dog relationship 30:For other uses, see 1873:Traditional Persian 1658:California Spangled 1628:Brazilian Shorthair 1424:Cultural depictions 1409:Cat-scratch disease 1018:2009CBio...19.R507M 752:on 22 January 2013. 623:Library of Congress 535:1991Natur.349Q.460. 454:Peters, G. (2002). 243:There is a unique " 92:Purring and meowing 1793:Oriental Shorthair 1703:European Shorthair 1618:American Shorthair 1566:World Cat Congress 827:Journal of Anatomy 746:"How A Puma Purrs" 523:Journal of Zoology 47: 2206: 2205: 2031:Hepatic lipidosis 1937: 1936: 1633:British Shorthair 1242:Tortoiseshell cat 1012:(13): R507–R508. 983:978-91-7519-579-7 975:978-91-7519-582-7 876:Mammalian Species 430:Cat communication 257:electromyographic 245:neural oscillator 122: 101: 80: 62: 16:(Redirected from 2236: 2196: 2195: 2180:Cats in folklore 1778:Norwegian Forest 1748:Kurilian Bobtail 1728:Japanese Bobtail 1708:Exotic Shorthair 1596: 1461:National Cat Day 1218: 1162: 1155: 1148: 1139: 1111: 1081: 1080: 1078: 1076: 1062: 1056: 1055: 1029: 997: 986: 955: 949: 938: 932: 921: 915: 904: 898: 897: 887: 867: 861: 860: 850: 818: 812: 811: 802:(104): 222–229. 787: 781: 780: 760: 754: 753: 748:. 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Index

Purring
Purr (disambiguation)
A domestic cat purring
A different domestic cat purring
Purring and meowing
Guinea pig producing purring-like sound
media help
felids
cats
domestic cat
Felis catus
genets
panther
felids
viverrids
raccoons
mongooses
kangaroos
wallabies
wallaroos
badgers
rabbits
guinea pigs
fundamental frequency
neural oscillator
electromyographic
vocal folds
larynx
glottis
harmonics

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