follower amplifier

例句：

1. 1.The speaker needs to use an amplifier to boost the volume of its audio signal.
   扬声器需要使用放大器来提高其音频信号的音量。
2. 2. The engineer used a follower amplifier to improve the quality of the audio signal.
   工程师使用了放大器来提高音频信号的质量。
3. 3. The music player has a built-in follower amplifier that can amplify the sound for better enjoyment.
   音乐播放器内置了一个放大器，可以放大声音以获得更好的享受。