electroacoustic transformer

例句：

1. 1. This electroacoustic transformer is used to amplify the sound from a microphone.
   这个电声变压器用于放大麦克风的声音。
2. 2.The engineer designed an electroacoustic transformer to improve the signal-to-noise ratio.
   工程师设计了一个电声变压器，以提高信号与噪声比。
3. 3. The electroacoustic transformer was used in the recording studio to enhance the audio quality.
   在录音室中使用了电声变压器来提高音频质量。