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                      扬声器的工作原理是什么北京11选5走势图果北京11选5走势图果?

                      文章出处:汉得利责任编辑:蜂鸣器人气:发表时间:2017-06-17 13:49字体: [ ]

                      磁铁在磁罩(T铁)与极片(夹板)之间形成一个封闭的磁间隙北京11选5走势图果,音圈与振膜胶合在一起,线圈放置在磁间隙中,线圈是一个很长很细的柱状体材料为金属线,当线圈通电时由于磁场的作用音圈会在磁间隙内作上下切割磁力线的运动,
                      当音乐转换成电流(交流信号)并通过线圈北京11选5走势图果北京11选5走势图果,会根据电流的大小产生不同频率的作用力. 同样磁场方向取决于法拉第的右手螺旋法则,作用力的大小取决于通过音圈电流的变化情况, 然后促使振动膜上下运动推动空气,根据不同的振动频率发出不同的声音。

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