microphonic tube

例句：

1. 1. The microphonic tubeis used to amplify the sound ofspeech.
   微音管用于放大语音的声音。
2. 2.The microphonic tube was designed toimprove the quality of audio signals.
   微音管被设计用来提高音频信号的质量。
3. 3.The microphonic tube is commonly usedin recording studios to enhance the clarityof vocals.
   微音管在录音室中常被使用来增强声音的清晰度。