pilot filter的用法和樣例：
例句
- This paper presents a theoretical study of the tunability of frequency selective filter extended cavity semiconductor lasers.
本文分析選頻濾波器負載外腔半導體激光器的調諧特性。 - An external pop protection screen may be necessary when close-miking vocalists.The use of a low frequency cutoff filter may also be effective.
當麥克風很靠近演唱者時，可能需要加一個外部靜電噪音保護屏，使用一個低頻截頻濾波器也可能有效。
