low-frequency amplification

例句：

1. 1.This device is designed to amplify low-frequency signals.
   这个设备被设计用来放大低频信号。
2. 2.The audio engineer used a low-frequency amplification circuit to improve the sound quality.
   音频工程师使用了低频放大电路来提高音质。
3. 3.In radio broadcasting, low-frequency amplification is crucial for transmitting clear signals over long distances.
   在广播中，低频放大对于远距离传输清晰信号至关重要。