Source: http://www.google.com/patents/US6072884?dq=5787449
Timestamp: 2014-03-08 20:01:09
Document Index: 164471451

Matched Legal Cases: ['art 5', 'art 5', 'Application No. 93112049', 'Application No. 93111138', 'Application No. 93112049', 'Application No. 93111138']

Patent US6072884 - Feedback cancellation apparatus and methods - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsFeedback cancellation apparatus uses a cascade of two filters along with a short bulk delay. The first filter is adapted when the hearing aid is turned on in the ear. This filter adapts quickly using a white noise probe signal, and then the filter coefficients are frozen. The first filter models parts...http://www.google.com/patents/US6072884?utm_source=gb-gplus-sharePatent US6072884 - Feedback cancellation apparatus and methodsAdvanced Patent SearchPublication numberUS6072884 APublication typeGrantApplication numberUS 08/972,265Publication dateJun 6, 2000Filing dateNov 18, 1997Priority dateNov 18, 1997Fee statusPaidAlso published asDE69814142D1, DE69814142T2, EP1033063A1, EP1033063B1, EP1545152A2, EP1545152A3, WO1999026453A1Publication number08972265, 972265, US 6072884 A, US 6072884A, US-A-6072884, US6072884 A, US6072884AInventorsJames Mitchell KatesOriginal AssigneeAudiologic Hearing Systems LpExport CitationBiBTeX, EndNote, RefManPatent Citations (5), Non-Patent Citations (42), Referenced by (91), Classifications (10), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetFeedback cancellation apparatus and methodsUS 6072884 AAbstract Feedback cancellation apparatus uses a cascade of two filters along with a short bulk delay. The first filter is adapted when the hearing aid is turned on in the ear. This filter adapts quickly using a white noise probe signal, and then the filter coefficients are frozen. The first filter models parts of the hearing-aid feedback path that are essentially constant over the course of the day. The second filter adapts while the hearing aid is in use and does not use a separate probe signal. This filter provides a rapid correction to the feedback path model when the hearing aid goes unstable, and more slowly tracks perturbations in the feedback path that occur in daily use. The delay shifts the filter response to make the most effective use of the limited number of filter coefficients.
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A CORPORATION OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KATES, JAMES MITCHELL;REEL/FRAME:008893/0338Effective date: 19971117RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google