专利名称：Method and device for attenuating the noise
generated at the outlet of an exhaust line
发明人：Christian Garabedian申请号：US10559934申请日：20040609
公开号：US20070071250A1公开日：20070329
专利附图：
摘要：A method for attenuating the low-frequency noise generated at the outlet () ofan exhaust line (). A signal representing the noise to be attenuated is defined; a first high-frequency acoustic wave (F) is emitted from a first transducer () into an attenuation region
() of the exhaust line (14), the first acoustic wave having a carrier frequency higher than 50kHz; and a second high-frequency acoustic wave (F+?f) is emitted by a second transducer() into the attenuation region () of the exhaust line, the second acoustic wave having thecarrier frequency of the first high-frequency acoustic wave (F) and containing a low-frequency counter-noise signal (?f) which is out of phase with the signal representing thenoise to be attenuated.
申请人：Christian Garabedian
地址：Voujeaucourt FR
国籍：FR
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容