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:
Dec. 13, 2011
Filed:
May. 14, 2009
Applicants:
Vasant Shridhar, Royal Oak, MI (US);
Duane Wertz, Byron, MI (US);
Inventors:
Vasant Shridhar, Royal Oak, MI (US);
Duane Wertz, Byron, MI (US);
Assignee:
Harman International Industries, Incorporated, Northridge, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 11/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An active noise control system generates an anti-noise signal to drive a first speaker group including at least one speaker to produce sound waves to destructively interfere with an undesired sound in at least one quiet zone. The active noise control system receives error signals representative of a combination of undesired sound and destructively interfering sound waves produced by the first speaker group. The active noise control system may select a second speaker group to replace the first speaker group based on the error signals.