名词
中文翻译：回声放大器
同义词：
['echo receiver', 'echo sounder例句：1. The echo amplifier is used to amplify the echo signal from the microphone.（回声放大器用于放大麦克风的回声信号。）']
例句：
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1. The echo amplifier is used to amplify the echo signal from the microphone.
回声放大器用于放大麦克风的回声信号。
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2.The echo amplifier was designed to improve the quality of audio recordings.
回声放大器被设计用来提高音频录音的质量。
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3. The echo amplifier is an essential tool for marine acoustics research.
回声放大器是海洋声学研究的一个必不可少的工具。