滤波器

例句：

1. 1. The engineer used a high-quality filter to improve the sound quality of the recording.
   工程师使用高质量的滤波器来提高录音的声音质量。
2. 2. The scientist designed a bandpass filter to filter out noise from the data.
   科学家设计了一个带通滤波器来从数据中过滤掉噪声。
3. 3. The audio engineer used a low-pass filter to reduce background noise in the music.
   音频工程师使用了低通滤波器来减少音乐中的背景噪音。