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. 26, 2011
Filed:
Sep. 01, 2006
Kristian Tjalfe Klinkby, Vaerloese, DK;
Peter Magnus Norgaard, Frederiksberg, DK;
Jorgen Cederberg, Frederiksberg, DK;
Kristian Tjalfe Klinkby, Vaerloese, DK;
Peter Magnus Norgaard, Frederiksberg, DK;
Jorgen Cederberg, Frederiksberg, DK;
Widex A/S, Lynge, DK;
Abstract
A hearing aid comprises an input transducer (), a subtraction node for subtracting a feedback cancellation signal from the electrical input signal thereby generating a processor input signal, a signal processor (), an output transducer (), a pair of equalization filters () for selecting from the processor input and output signals a plurality of frequency band signals, a frequency equalization unit for frequency equalization for the selected frequency band signals, and an adaptive feedback estimation filter () for adaptively deriving the feedback cancellation signal from the equalized frequency band signals. The equalization of selected frequency bands of the input signals of the adaptive feedback cancellation filter provides for an improved and in particular a faster adaption of the feedback cancellation. The invention further provides a method of reducing acoustic feedback of a hearing aid, and a hearing aid circuit.