IP Library Granted Patent US 7,010,135
Granted Patent B2
US 7,010,135 · App. 10/263,126 · Granted Mar 7, 2006

Method to determine a feedback threshold in a hearing device

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Quick Facts
Patent No.
US 7,010,135
App. No.
10/263,126
Granted
Mar 7, 2006
Kind
B2
Abstract

A feedback threshold in a hearing device is determined by feeding an input signal to the hearing device while it is inserted in an ear canal of a user. The input signal results in a higher amplification than a supposed, that is, not yet known, feedback threshold. An amplification in the forward path of the device is measured. The feedback threshold is equal to the measured amplification.

Claims (6)

1. A method to determine a feedback threshold in a hearing device, the method comprising the steps of feeding an input signal to the hearing device inserted to an ear canal of a hearing device user, which input signal results in a higher amplification than the feedback threshold to be determined, measuring an amplification in the forward path of the hearing device, the measured amplification being equal to the feedback threshold, adjusting a course of amplification in function of the level of the input signal in the hearing device as follows: choosing a slope of −1 for a course of amplification represented double-logarithmically in a first phase, and choosing a slope less than −1 for a course of amplification represented double-logarithmically in a second phase.

2. The method according to claim 1 , whereby the human hearing range is split into frequency bands, a feedback threshold being determined in at least one of the frequency bands.

3. The method according to claim 2 , whereby in each of the frequency bands a feedback threshold is being determined.

4. The method according to claim 1 , whereby the amplification in the hearing device is being limited on the basis of the feedback threshold or feedback thresholds, respectively.

5. The method according to claim 2 , whereby the amplification in the hearing device is being limited on the basis of the feedback threshold or feedback thresholds, respectively.

6. The method according to claim 3 , whereby the amplification in the hearing device is being limited on the basis of the feedback threshold or feedback thresholds, respectively.

Assignments (1)
CHANGE OF NAME Recorded Sep 24, 2015
From: PHONAK AG
To: SONOVA AG
Reel/Frame 036674/0492 →