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sound
In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water. In physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the brain.
==Acoustics==
Acoustics is the interdisciplinary science that deals with the study of mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound, and infrasound. A scientist who works in the field of acoustics is an ''acoustician'', while someone working in the field of acoustical engineering may be called an ''acoustical engineer''.〔ANSI S1.1-1994. American National Standard: Acoustic Terminology. Sec 3.03.〕 An audio engineer, on the other hand is concerned with the recording, manipulation, mixing, and reproduction of sound.
Applications of acoustics are found in almost all aspects of modern society, subdisciplines include aeroacoustics, audio signal processing, architectural acoustics, bioacoustics, electro-acoustics, environmental noise, musical acoustics, noise control, psychoacoustics, speech, ultrasound, underwater acoustics, and vibration.〔(【引用サイトリンク】title=PACS 2010 Regular Edition—Acoustics Appendix )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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