phonometer

例句：

1. 2.
   用于测量声音的
2. 3.
   在医学上
3. 1. The phonometer was used to measure the pitch of the song.
   使用测音器来测量歌曲的音调。
4. 2. Doctors use stethoscopes to listen to the heartbeat during a patient's visit.
   医生使用听诊器在病人访问期间听取心跳。
5. 3. During an emergency, the otoscope is used to diagnose hearing loss in patients.
   在紧急情况下，听诊器被用来诊断患者的听力损失。