The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 2005
Filed:
Mar. 26, 2002
Richard Donald Mcwilliam, Shedden, CA;
Richard Donald McWilliam, Shedden, CA;
Siemens VDO Automotive Inc., Chatham, CA (US);
Abstract
A noise attenuation system () for an air induction system () includes an air inlet duct () having an open end () to draw in air and a loudspeaker () mounted within the inlet duct () and facing the open end () of the inlet duct (). The air horn () is connected to the loudspeaker () to tune the sound output and increase the sound power from the loudspeaker () to optimize cancellation of noise generated by the air induction system () at lower frequencies. An open end () of the air horn () is positioned within a plane defined by the open end () of the air inlet duct (). A microphone () is positioned near the air inlet duct () and is in communication with a controller (). The controller () generates an input to the loudspeaker (). The input to the loudspeaker () is out of phase with the noise detected by the microphones () to cancel a portion of noise emitted from the open end () of the air inlet ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile