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音频受到WIFI辐射反射干扰杂音

在设计的一款监控产品,音频电路上的拾音器(咪头)易受到WIFI天线的信号反射干扰(机器有金属前面板,去掉此面板干扰消除),产生塔塔声杂音干扰,请教

有何方法可以消除此杂音?