发明名称 ACTIVE SILENCING DEVICE AND AIR BLOWER USING THE SAME
摘要 <p><P>PROBLEM TO BE SOLVED: To provide an active silencing device, capable of effectively reducing noise which three-dimensionally spreads in a shape of a spherical wave, and to provide an air blower using the same. <P>SOLUTION: The active silencing device 51 includes: a plurality of ducts 52 and a sound wave generation unit 53 for silencing. The plurality of ducts 52 are hollow ducts including an entrance and exit, and the entrance faces a sound source of emission sound having three dimensional sound pressure distribution, and the emission sound is changed to a plane wave inside the duct. The sound wave generation unit 53 which is provided in each of the plurality of ducts 52, generates a sound wave in which a phase is opposite from the plane wave. <P>COPYRIGHT: (C)2011,JPO&INPIT</p>
申请公布号 JP2010256896(A) 申请公布日期 2010.11.11
申请号 JP20100081947 申请日期 2010.03.31
申请人 DAIKIN IND LTD 发明人 KIKUCHI YOSHIMASA;KOJIMA AZUMI;SAYANAGI TSUNEHISA;HIEI TAKEHIKO;NOUCHI YOSHITERU;ISEDA KENICHI
分类号 G10K11/178;F24F13/02 主分类号 G10K11/178
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