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求TI全双工窗口对讲机方案

Hello , 

窗口对讲机目前用于银行柜台,目前大多都是半双工的,即同一时间只允许一个人讲话,这个过程涉及到降噪问题,同时Speaker的声音容易返回到Mic 传回去,这个如何解决,希望TI能帮忙提供解决方案。thanks