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:
Aug. 06, 2013
Filed:
Jun. 04, 2008
Jesper Bünsow Boldt, Smorum, DK;
Thomas BO Elmedyb, Smørum, DK;
Jesper Bünsow Boldt, Smorum, DK;
Thomas Bo Elmedyb, Smørum, DK;
Oticon A/S, Smorum, DK;
Abstract
The invention relates to a hearing aid system comprising an input transducer, a forward path, an output transducer and an electrical feedback path, the forward path comprising a signal processing unit for modifying an electrical input signal to a specific hearing profile over a predefined frequency range, wherein the predefined frequency range comprises a number of frequency bands, for which maximum forward gain values IGfor each band can be stored in a memory, the electrical feedback path comprising an adaptive filter for estimating acoustical feedback from the output to the input transducer. The invention further relates to a method of adapting a hearing aid system to varying acoustical input signals. The object of the present invention is to provide an alternative acoustic feedback compensation scheme. The object is fulfilled in that the hearing aid system further comprises an online feedback manager unit for—with a predefined update frequency—identifying current feedback gain in each frequency band of the feedback path, and for subsequently adapting the maximum forward gain values in each of the frequency bands in dependence thereof in accordance with a predefined scheme. This has the advantage of providing a diminished probability for disturbing feedback improved feedback cancellation. The invention may e.g. be used in digital hearing aids for use in a variety of acoustical environments.