low band filter

例句：

1. 1. The engineer used a low-pass filter to reduce noise in the data.
   工程师使用了一个低通滤波器来减少数据中的噪声。
2. 2. In digital signal processing, low-pass filters are commonly used to remove high-frequency noise.
   在数字信号处理中，低通滤波器通常用于去除高频噪声。
3. 3. The audio engineer applied a low-pass filter to enhance the clarity of the recording.
   音频工程师应用了一个低通滤波器来提高录音的清晰度。