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Method and apparatus for feedback suppression

A feedback suppression and feedback signal technology, applied in hearing aids, electrical components, etc., can solve problems such as feedback suppression limitations and adaptive filter implementation limitations, and achieve the effect of suppressing feedback and reducing resource requirements.

Active Publication Date: 2019-06-11
SIVANTOS PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Adaptive filters are limited in their implementation because filters with a large length, i.e. filters that also take into account strongly delayed signals, have long delay times and require memory space for the buffering of sample values ​​(Abtastwert) and coefficients
Therefore, feedback suppression of signals with short runtimes on the feedback path by adaptive filters is limited in the prior art

Method used

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  • Method and apparatus for feedback suppression
  • Method and apparatus for feedback suppression
  • Method and apparatus for feedback suppression

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Embodiment Construction

[0031] figure 1 The basic structure of a hearing aid device 100 according to the invention is shown. In the hearing aid device housing 10, 20, one or more microphones, also called acoustic-electric converters 2, are built in for receiving sound or acoustic signals from the surroundings. However, the invention is not limited to the shown in-ear hearing aid device (IdO), but can be similarly applied to behind-the-ear hearing aid devices (HdO) or CiC hearing aid devices. The microphone is an acoustic-electric converter 2 for converting sound into a first electrical audio signal. The signal processing device 3 , which is likewise arranged in the hearing aid device housing 10 , 20 , processes the first audio signal. The output signal of the signal processing means 3 is transmitted to a loudspeaker or earpiece 4, which outputs an acoustic signal. If necessary, the sound is transmitted to the eardrum of the device wearer via a sound tube that is fixed in the ear canal with an otop...

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PUM

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Abstract

The invention relates to a method for reducing feedback in a hearing aid device and a corresponding device. In the method, a first transfer function is evaluated for a first segment of the signal response including a feedback path. For the second segment of the signal response, the energy of the feedback signal of the second transfer function of the feedback path is evaluated, and parameters of the signal processing device and / or the feedback suppression unit are set depending on the evaluated energy.

Description

technical field [0001] The invention relates to a hearing aid device, wherein the hearing aid device has an acoustic-electric converter, a signal processing device, a feedback suppression unit and an electro-acoustic converter. Background technique [0002] A hearing aid device is a wearable hearing aid device used to provide hearing assistance to the hearing impaired. In order to meet the needs of a large number of individuals, hearing aid devices of different structures are provided, such as hearing aid devices behind the ear (HdO), hearing aid devices with external earpieces (RIC: receiver in the canal (receiver in the channel)) and in-ear aids. A hearing device (IdO), for example also an external ear hearing device or an in-canal hearing device (ITE, CIC). The exemplary hearing aids are worn on the outer ear or in the ear canal. In addition, however, bone conduction hearing aids, implantable or vibration-tactile hearing aids are also available on the market. In this c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R25/00
CPCH04R25/453
Inventor T.D.罗森克兰茨T.沃兹巴彻
Owner SIVANTOS PTE LTD