long pass filter

例句：

1. 1. The long pass filter is used to remove high-frequency noise from the signal.
   长通带滤波器用于从信号中去除高频噪声。
2. 2. In this circuit, the long pass filter is designed to block out interference from external sources.
   在这个电路中，长通带滤波器被设计来阻挡外部干扰。
3. 3. The long pass filter helps to enhance the quality of the audio signal by reducing distortion and noise.
   长通带滤波器通过减少失真和噪声来提高音频信号的质量。