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11. 发明申请

US20120024623A1 NOISE ATTENUATOR AND VEHICLE AIR INTAKE DUCT PROVIDED THEREWITH 有权
标题翻译：噪音衰减器和汽车空气吸入器提供
公开(公告)号：US20120024623A1
公开(公告)日：2012-02-02
申请号：US13154041
申请日：2011-06-06
申请人： Katsuhiro TANGE , Takashi YAMAGUCHI
发明人： Katsuhiro TANGE , Takashi YAMAGUCHI
IPC分类号： E04F17/04
CPC分类号： F02M35/1244 , F02M35/1266 , F02M35/1277 , F02M35/1283 , G10K11/175
摘要： A noise attenuator which can reduce time and cost for installation thereof as compared with the conventional configuration and a vehicle air intake duct provided with the noise attenuator are provided. The noise attenuator includes a pair of circular through holes formed through a duct wall, a pair of wave transmitting/receiving membrane which are stretched so as to close the circular through holes, and a seesaw member which connects between central portions of the paired transmitting/receiving membranes. Accordingly, when one of the membranes receives a sound wave of noise thereby to be vibrated at a predetermined frequency, the other membrane follows it and is also vibrated while shifted by a half cycle. As a result, a cancellation wave with a phase opposite to the sound wave received by the one membrane is transmitted from the other membrane, whereupon the noise can be attenuated.
摘要翻译：提供了与常规配置相比可以减少安装时间和成本的噪声衰减器以及设置有噪声衰减器的车辆进气管道。噪声衰减器包括：通过导管壁形成的一对圆形通孔;一对被拉伸以闭合圆形通孔的波浪传播/接收膜;以及在配对的发送/接收膜的中心部分之间连接的跷跷板构件，接收膜。因此，当其中一个膜接收到噪声的声波，从而以预定频率振动时，另一个膜跟随它，并且在偏移半个周期的同时也被振动。结果，与另一个膜接收到的与声波相反的相位的消除波从另一个膜传输，从而可以减弱噪声。

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