音响喇叭可以当话筒，通过震动产生的震动音频信号必须要经过载频混频后才能产生特定载波频率的无线电信号。

来源: 大阿牛于 2023-04-26 17:36:36 [旧帖] [给我悄悄话] 本文已被阅读：次

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