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Most modern white noise generators are electronic, usually generating the sound in real-time with audio test equipment, or via electronic playback of a digital audio recording. Simple mechanical machines consist of a very basic setup, involving an enclosed fan and, optionally, a speed switch. This
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who needs certain sounds for therapies and treatments on a mental level, and patients who have conditions such as insomnia, anxiety, and, tinnitus (these conditions are managed with special devices which are designed to create certain sounds that treat such conditions at a mental level). A white
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devices recommend that the volume of white noise machines be initially set at a comfortable level, even if it does not provide the desired level of privacy. As the ear becomes accustomed to the new sound and learns to tune it out, the volume can be gradually increased to increase privacy.
174:. Sleep-aid and nap machine products may also produce other soothing sounds, such as music, rain, wind, highway traffic and ocean waves mixed with—or modulated by—white noise. Electric fans are a common alternative, although some Asian communities historically avoided using fans due to the
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Sound and noise have their own measurement and color coding techniques, which allows specialized users to identify noise and sound according to their respective needs and utilization. These specialized needs are dependent on certain professions and needs, e.g. a
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fan drives air through small slots in the machine's casing, producing the desired sound. The first fan-based white noise machine was the Marpac Dohm, which was invented in 1962 and is frequently credited as the original domestic use white noise machine.
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is a device that produces a noise that calms the listener, which in many cases sounds like a rushing waterfall or wind blowing through trees, and other serene or nature-like sounds. Often such devices do not produce actual
264:. Bracelet of Silence is portable and not attached to smart speakers, thus it is possible that this device can be used to prevent eavesdropping of other devices as well, for example smartphones and laptops.
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One paper found that of the 14 white noise machines tested at maximum volume, all exceeded maximum safe sound levels for infants (50 dB). Three exceeded safe levels for adults (85 dB).
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White noise devices are available from numerous manufacturers in many forms, for a variety of different uses, including audio testing, sound masking,
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There is not a lot of research on the impact of loud sounds at inaudible frequencies (and their respective audible artifacts and harmonics).
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White noise machines are used to diminish the potential for recording or overhearing conversations.
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had a white noise machine installed in his office to prevent against eavesdropping.
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noise machine has “white” as the color code given to that noise having a particular
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them while sleeping. White noise generators are often used by people with
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344:, via joongangdaily.joins.com and archive.org. Retrieved on 2007-08-30.
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devices recommend that the volume level be set slightly louder than
356:"Will sleeping in a closed room with an electric fan cause death?"
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444:"Activate This 'Bracelet of Silence,' and Alexa Can't Eavesdrop"
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526:"Infant sleep machines and hazardous sound pressure levels"
390:, Volume 96, Issue 1, Pages 47–59. Retrieved on 2007-09-06.
385:"Asphyxia due to oxygen deficiency by gaseous substances."
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Gill, James R., Susan F. Ely, and
Zhongxue Hua. (2002).
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Watanabe, Toshifumi, and
Masahiko Morita. (1998-08-31).
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The
American Journal of Forensic Medicine and Pathology
46:. Unsourced material may be challenged and removed.
463:"Sound Effects – Exploring acoustic cyber-weapons"
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413:, 23(1):26 –30, 2002. Retrieved on 2007-09-06.
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106:Learn how and when to remove this message
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339:"Newspapers fan belief in urban myth."
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44:adding citations to reliable sources
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442:Hill, Kashmir (14 February 2020).
244:have been developed. For example,
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493:"The Sound of Silence"
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