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收音机是否天线越长收听效果越好
更新时间: 2020-07-02 00:00:00  

收音机是用“电磁感应”原理接收电磁波信号。收音机是通过一个金属体或线圈(天线)将感应到的电磁波转换为电信号,再通过电路的处理和变换,转为声音发出。收音机的收听效果与收音机中的金属体或线圈感应到的电磁波强弱以及电路的处理有关,同天线的长短无关。因此,收音机的收听效果不是天线越长越好。

关键词: 收音机 是否 天线 收听 效果

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