noise-free equivalent amplifier

例句：

1. 1.The noise-free equivalent amplifier is an essential tool for recording audio.
   无噪声等效放大器是录音必备的工具。
2. 2.In the digital age, noise-free equivalent amplifiers are crucial for maintaining high-quality sound.
   在数字时代，无噪声等效放大器对于保持高质量声音至关重要。
3. 3. The engineer used a noise-free equivalent amplifier to enhance the clarity of the recorded audio.
   工程师使用无噪声等效放大器来提高录制音频的清晰度。