Hearing device comprising a beamformer filtering unit

A technology of shaper and beam pattern, which is applied in the prevention of sound wave response, the adaptation of hearing aids for hearing loss, and instruments, etc. It can solve the problems that are not quite satisfactory, and achieve the effect of reducing noise

Active Publication Date: 2017-11-17
OTICON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In a very noisy environment, this beamformer may behave as desired to maintain intelligibility, but in a less noisy environment, such a beamformer is less desirable because the listener prefers to know the sound coming from all directions. sound ability

Method used

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  • Hearing device comprising a beamformer filtering unit
  • Hearing device comprising a beamformer filtering unit
  • Hearing device comprising a beamformer filtering unit

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Embodiment Construction

[0125] The detailed description set forth below in connection with the accompanying drawings serves as a description of a number of different configurations. The detailed description includes specific details to provide a thorough understanding of various concepts. It will be apparent, however, to one skilled in the art that these concepts may be practiced without these specific details. Several aspects of the apparatus and methods are described in terms of a number of different blocks, functional units, modules, elements, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). Depending on the particular application, design constraints or other reasons, these elements may be implemented using electronic hardware, computer programs or any combination thereof.

[0126]Electronic hardware may include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), gatin...

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Abstract

A hearing aid comprises a) first and second microphones b) an adaptive beamformer filtering unit comprising, b1) a first and second memories comprising a first and second sets of complex frequency dependent weighting parameters representing a first and second beam patterns, where said first and second sets of weighting parameters are predetermined initial values or values updated during operation of the hearing aid, b3) an adaptive beamformer processing unit providing an adaptation parameter representing an adaptive beam pattern configured to attenuate unwanted noise under the constraint that sound from a target direction is essentially unaltered, b4) a third memory comprising a fixed adaptation parameter representing a third, fixed beam pattern, a mixing unit providing a resulting complex, frequency dependent adaptation parameter as a combination of said fixed and adaptively determined frequency dependent adaptation parameters, respectively, and a resulting beamformer for providing a resulting beamformed signal YBF based on first and second microphone signals, said first and second sets of complex frequency dependent weighting parameters, and said resulting complex, frequency dependent adaptation parameter .

Description

technical field [0001] The present invention relates to the field of hearing devices such as hearing aids, and in particular to spatial filtering and hearing aids comprising an adaptive beamformer filter unit. Background technique [0002] The directivity achieved by beamformers in hearing aids is an effective way to attenuate unwanted noise, as the direction-dependent gain cancels out noise from one direction while preserving sounds of interest from another, making possible Improve speech intelligibility. Typically, a beamformer in a hearing instrument has a beam pattern that is continuously adjusted to minimize noise without changing the sound from the direction of the target. [0003] Despite the aforementioned potential benefits, directionality also has some disadvantages. The result of noise removal may also remove some sounds of interest. Adaptive beamformers have the potential to completely cancel sound from certain directions. By this, the ability to remain aware...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R25/00
CPCH04R25/405H04R25/45H04R25/505H04R25/70H04R2225/41H04R2430/23G10L21/0232G10L2021/02166H04R25/407H04R25/552H04R25/554H04R25/558H04R25/606H04R2225/43H04R2225/61H04R2430/20H04R25/353
Inventor A·T·贝特尔森M·S·佩德森J·詹森T·考尔伯格M·克里斯托弗森
Owner OTICON
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