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            <p>&nbsp;反射和扩散。通常需要进�q�多�ơ反���后�Q�声能密度才能衰减到可以被忽略的�E�度。当声源�q�箋�E�_��的辐���声波时�Q�空间内各点的声能是来自各方向声波叠加的�l�果。其中，没有�l�过反射直接由声源传播到某点的声波称为直辑֣��Q�经�q�一�ơ或多次反射声�L的叠加称为�؜响声。那么所谓的混响其实可以理解为：(x��)声源停止发声后，在声��Z���q�存在着来自各界面迟到的反射声�Ş成的声音&ldquo;�D�留&rdquo;现象。这�U�残留现象的长短�Q�用混响旉���来表�C��?/p>            <ul class="pager">
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