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单词 thermophone
释义 thermophone
 /therr"meuh fohn'/,  n.  
 an electroacoustic transducer that forms sound waves by the expansion and contraction of the air adjacent to a conductor that varies in temperature according to the magnitude of the current passing through it; formerly used to calibrate microphones.
 [1875-80; THERMO- + -PHONE]
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更新时间:2024/11/10 12:30:56