acoustic relay

例句：

1. 1. The acoustic relay is a crucial component in the sound transmission system.
   声学中继器是声音传输系统的关键组成部分。
2. 2.The acoustic relay was designed to improve the signal quality during long-distance communication.
   声学中继器被设计用来提高远距离通信的信号质量。
3. 3. In the acoustic relay design, the primary function is to amplify the weak signals and transmit them accurately.
   在声学中继器的设计中，主要功能是放大微弱信号并准确传输。