Pressure gradient microphone

Japanese: 圧力傾度マイクロホン - あつりょくけいどまいくろほん
Pressure gradient microphone

...This type of directional characteristic is called omnidirectional (Figure 6). (2) Pressure gradient microphone It has an output proportional to the spatial derivative of sound pressure (approximately equal to the difference in sound pressure at two adjacent points divided by the distance between the two points). Since this derivative is proportional to the particle speed of the sound wave, it is also called a velocity microphone.

*Some of the terminology that refers to "pressure gradient microphone" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このような指向特性を無指向性という(図6)。(2)圧力傾度マイクロホンpressure gradient microphone 音圧の空間についての微係数(近接した二つの点における音圧の差を2点間の距離で割った値にほぼ等しい)に比例した出力をもつ。この微係数は音波の粒子速度に比例することから,ベロシティマイクロホンと呼ばれることもある。…

※「圧力傾度マイクロホン」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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