acoustical switch

例句：

1. 1. The new acoustical switch is more energy-efficient than the old one.
   新的声学开关比旧的更节能。
2. 2. The engineer used an acoustical switch to detect the sound of the explosion.
   工程师使用声学开关来探测爆炸声。
3. 3.The acoustical switch was designed to improve the sound quality of the recording equipment.
   声学开关被设计用来提高录音设备的音质。