https://wikimd.com/index.php?action=history&feed=atom&title=Sound
Sound - Revision history
2026-04-07T22:46:49Z
Revision history for this page on the wiki
MediaWiki 1.44.2
https://wikimd.com/index.php?title=Sound&diff=6324863&oldid=prev
Prab: CSV import
2025-02-18T11:57:02Z
<p>CSV import</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 11:57, 18 February 2025</td>
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Prab
https://wikimd.com/index.php?title=Sound&diff=5287694&oldid=prev
Prab: CSV import
2024-02-25T12:20:57Z
<p>CSV import</p>
<p><b>New page</b></p><div>'''Sound''' is a [[vibration]] that propagates as an [[acoustic wave]], through a [[transmission medium]] such as a [[gas]], [[liquid]] or [[solid]].<br />
<br />
In human [[physiology]] and [[psychology]], sound is the reception of such waves and their perception by the [[brain]]. Humans can hear sound waves with frequencies between about 20 Hz and 20 kHz. Sound above 20 kHz is [[ultrasound]] and below 20 Hz is [[infrasound]]. Other species have different hearing ranges.<br />
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== Physics of sound ==<br />
Sound is a sequence of waves of pressure that propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). Sound that is perceptible by humans has frequencies from about 20 Hz to 20,000 Hz. In air at standard temperature and pressure, the corresponding wavelengths of sound waves range from 17 m to 17 mm.<br />
<br />
== Perception of sound ==<br />
The perception of sound in any organism is limited to a certain range of frequencies. For humans, hearing is normally limited to frequencies between about 20 Hz and 20,000 Hz (20 kHz), although these limits are not definite. The upper limit generally decreases with age. Other species have a different range of hearing. For example, dogs can perceive vibrations higher than 20 kHz.<br />
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== See also ==<br />
* [[Acoustics]]<br />
* [[Psychoacoustics]]<br />
* [[Ultrasound]]<br />
* [[Infrasound]]<br />
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== References ==<br />
<references /><br />
<br />
[[Category:Acoustics]]<br />
[[Category:Sound]]<br />
[[Category:Vibration]]<br />
[[Category:Waves]]<br />
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{{stub}}<br />
{{dictionary-stub1}}</div>
Prab