名词
中文翻译：调音器
同义词：
['tone meter', 'pitch meter']
例句：
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1. The engineer used a tone meter to measure the pitch of the song.
工程师使用调音器来测量歌曲的音调。
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2. The piano teacher taught his students how to use a tone meter for tuning their instruments.
钢琴老师教学生们如何使用调音器来调整他们的乐器。
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3. During the recording session, the sound engineer used a tone meter to ensure that all the instruments were in perfectharmony.
在录音期间，声音工程师使用调音器确保所有乐器都完美和谐。