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            <h1><i class="fa fa-envira"></i>吔R��的原理是什�?/h1><hr style="margin-bottom:30px">
            <p><span style="font-size: 14px;">声音�q�入多孔材料或引起可弯曲变�Ş的板振动后，声能转化为热能的效应。声波在�I�气中传播与�I�气质点因振动摩擦��声能转化为热能，引�v的声波随传播距离增加逐渐衰减的现象，�U�Cؓ(f��)�I�气吸收�Q�当声�L入射多孔吸声材料�Ӟ���׃���I�气的粘滞阻力，�I�气与孔壁的振动摩擦�Q���相当一部分声能转化成热能而被吸收�Q�称为材料吸声�?/span></p>
<p><span style="font-size: 14px;">&nbsp;��M��材料对入���声能或多或���都有一些吸声能力，�q�_��吸声�p�L�����过0.2的材料才�U�Cؓ(f��)</span><span style="font-size: 14px;">吸声材料</span><span style="font-size: 14px;">。多孔吸声材料吸声频率的�Ҏ(gu��)��是:中高频吸声系数较大，低频吸声�p�L��较小�?/span></p>
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