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:
Jul. 05, 2011
Filed:
Feb. 17, 2006
Tjalfe Kristian Klinkby, Varlose, DK;
Thilo Volker Thiede, Ballemo, DK;
Tjalfe Kristian Klinkby, Varlose, DK;
Thilo Volker Thiede, Ballemo, DK;
WIDEX A/S, Lynge, DK;
Abstract
A hearing aid having an input transducer (), a signal processor (), an output transducer () and an adaptive filter () for generating a feedback cancellation signal () further comprises a norm estimator () generating a first norm signal () indicative of a norm of the electrical input signal and a second norm signal () indicative of a norm of a feedback-cancelled electrical input signal, a comparator for comparing the first and second norm signals and generating a difference value N−Nand a decision unit disabling application of the feedback cancellation signal to the signal path of the hearing aid if the difference value is above a certain threshold value cthus avoiding the feedback cancellation mechanism actually increasing acoustic feedback of the hearing aid. The invention also provides a method for reducing acoustic feedback of a hearing aid, a computer program, and an electronic circuit for a hearing aid.