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:
May. 28, 2013
Filed:
Mar. 17, 2011
Georg-erwin Arndt, Obermichelbach, DE;
Jens Hain, Kleinsendelbach, DE;
Georg-Erwin Arndt, Obermichelbach, DE;
Jens Hain, Kleinsendelbach, DE;
Siemens Medical Instruments Pte. Ltd., Munich, DE;
Abstract
Sound from the receiver of a hearing device may be fed back to its microphones via acoustic feedback paths, which may cause undesirable whistling. It is particularly difficult to predict the creation of feedback in a microphone array with adjustable directional characteristic. This is because the stability of the system then is dependent on a directional parameter by way of which the directional characteristic is fixed. The invention enables feedback-free operation of such a hearing device. A prescribed stability condition is used to establish for which values of the directional parameter feedback-free operation is possible. The directional parameter is then restricted to these values during operation of the hearing device. As an alternative thereto, a value for a strength of a feedback effect is established for a current value of the directional parameter and the directional parameter or a control parameter for the purpose of feedback suppression is then set as a function of the established value.