stethophonometer

例句：

1. 1.The stethophonometer was used to measure the sound pressure level in the room.
   测声器被用来测量房间内的声音压力水平。
2. 2. The engineer used the stethophonometer to check the accuracy of the microphone.
   工程师使用测声器来检查麦克风的准确性。
3. 3. The stethophonometer was used to study the acoustic properties of materials.
   测声器被用来研究材料的声学性质。