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target="_blank">排气?/a>是由两个长度不同的管道构成,这两个管道先分开再交汇。由于两个管道的的长度差值等于汽车所发出的声波的波长的一半,使得两列声波在叠加时发生干涉时相互抵消而减弱声强,使声音减小,从而起到消音的效果。阻性消声器主要是利用多孔吸声材料来降低噪声的。把吸声材料固定在气流通道的内壁上或按照一定方式在管道中排列,就构成了阻性消声器。当声波进入阻性消声器时,一部分声能在多孔材料的孔隙中摩擦而转化成能耗散掉,使通过消声器的声波减弱。阻性消声器就好象电学上的纯电阻电路,吸声材料类似于电阻。因此,人们就把这种消声器称为阻性消声器。阻性消声器对中高频消声效果好、对低频消声效果较差?nbsp; </span><br /> <span style="font-size:16px;"> 抗性消声器是由突变界面的管和室组合而成的,好象是一个声学滤波器,与电学滤波器相似,每一个带管的小室是滤波器的一个网孔,管中的空气质量相当于电学上的电感和电阻,称为声质量和声阻。小室中的空气体积相当于电学上的电容,称为声顺。与电学滤波器类似,每一个带管的小室都有自己的固有频率。当包含有各种频率成分的声波进入第一个短管时,只有在第一个网孔固有频率附近的某些频率的声波才能通过网孔到达第二个短管口,而另外一些频率的声波则不可能通过网孔.只能在小室中来回反射,因此,我们称这种对声波有滤波功能的结构为声学滤波器。选取适当的管和室进行组合.就可以滤掉某些频率成分的噪声,从而达到消声的目的。抗性消声器适用于消</span><br /> <span style="font-size:16px;">中、低频噪声?</span><br /> <span style="font-size:16px;">    把阻性结构和抗性结构按照一定的方式组合起来,就构成了阻抗复合式消声器。微穿孔板消声器一般是用厚度小?mm的纯金属薄板制作,在薄板上用孔径小于1mm的钻头穿孔,穿孔率为1一3。选择不同的穿孔率和板厚不同的腔深,就可以控制消声器的频谱性能,使其在需要的频率范围内获得良好的消声效果。小孔消声器的结构是一根末端封闭的直管,管壁上钻有很多小孔。小孔消声器的原理是以喷气噪声的频谱为依据的,如果保持喷口的总面积不变而用很多小喷口来代替,当气流经过小孔时、喷气噪声的频谱就会移向高频或超高频,使频谱中的可听声成分明显降低,从而减少对人的干扰和伤害?</span><br /> <span style="font-size:16px;">     有源消声器的基本原理是在原来的声场中,利用电子设备再产生一个与原来的声压大小相等、相位相反的声波,使其在一定范围内与原来的声场相抵消。这种消声器是一套仪器装置,主要由传声器、放大器、相移装置、功率放大器和扬声器等组成?/span><br /> <p> <span style="font-size:16px;">    经过小编的详细介绍,您是不是已经掌握了卡车消音器的工作原理了呢?如果您还有问题可以在网站上给我们留言,小编看见会尽快时间给您回复,当然您也可以电话联系我们,我们同样会耐心解答您的问题,那今天的内容就是这样了,让我们下次再见吧?/span> </p> <p> <span style="font-size:16px;"><img style="max-width:100%;" src="http://www.evraband.com/uploads/news/20210514045715.jpg" /><br /> </span> </p> <br /> <br /> <div class="tag">相关标签?/div> <div class=""> <div>上一?<a href="143.html">汽车消声器厂家介绍汽车消声器能够起到哪些作用?/a></div> <div>下一?<a href="141.html">货车消声器的保养方法</a></div> </div> </div> </div> </div> <div id="end_bj"> <div id="end_nav"> <a href="/" 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