膨ぼう張ちょう度ど

noun

dilation (acoustics)

Technical term in acoustics for the expansion phase of a sound wave, opposite of compression (圧縮度).

• 音おん波ぱの膨ぼう張ちょう度どと圧あっ縮しゅく度どを測そく定ていする。

  Measure the dilation and compression of the sound wave.