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:
Apr. 28, 2015
Filed:
Mar. 12, 2013
Applicant:
Wolfson Microelectronics Plc, Edinburgh, GB;
Inventors:
Julian Penketh, Oldham, GB;
Abid Rashid, Reading, GB;
Assignee:
Cirrus Logic International (UK) Limited, Edinburgh, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 11/06 (2006.01); G10K 11/16 (2006.01); H03B 29/00 (2006.01); G10K 11/175 (2006.01); G10K 11/178 (2006.01);
U.S. Cl.
CPC ...
G10K 11/175 (2013.01); G10K 11/1784 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/3028 (2013.01); G10K 2210/3056 (2013.01); G10K 2210/503 (2013.01);
Abstract
A noise cancellation system generates a noise cancellation signal from a signal representing ambient noise by signal processing. The signal processing applies a controllable gain value, and includes a high pass filter with a controllable cut-off frequency. A control block detects a wind amplitude. The cut-off frequency of the high pass filter is controlled based on the detected wind amplitude. A low pass function is applied to the detected wind amplitude, and the controllable gain is adjusted based on the output of the low pass function.