Wide dynamic compression method of digital hearing aid based on sound pressure level segmentation

A compression method and sound pressure level technology, applied in hearing aids, electrical components, etc., can solve problems such as poor effect and difficulty in meeting patient needs

Active Publication Date: 2016-01-06
南京天悦电子科技有限公司
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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a wide dynamic compression method for digital hearing aids based on sound pressure level segmentation, by subdividing the sound pressure level into eight segmen...

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  • Wide dynamic compression method of digital hearing aid based on sound pressure level segmentation
  • Wide dynamic compression method of digital hearing aid based on sound pressure level segmentation
  • Wide dynamic compression method of digital hearing aid based on sound pressure level segmentation

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0051] The invention subdivides the sound pressure level into eight sections, realizes different input sound pressure level compensation and gains that are more in line with the actual needs of patients, and solves the technical problem that hearing aid compensation methods in the prior art have poor effects and are difficult to meet the needs of patients.

[0052] The digital hearing aid loudness compensation model adopted in the present invention is as follows figure 1 As shown, 101 is the current frame input speech signal x(n) (n=0,1,...,N-1). 102 is 16-channel 6-order IIR analysis filter bank H i (z)(i=0,1,...,15), to achieve multi-channel decomposition of voice signals, the prototype of i...

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Abstract

The invention discloses a wide dynamic compression method of a digital hearing aid based on sound pressure level segmentation, wherein the wide dynamic compression method comprises the following steps: framing a voice signal, and filtering the framed signal through a 16-channelnonuniform spaced 6-order IIR decomposition filter bank; then, calculating the sound pressure levels of the voice signals of the channels, and obtaining a hearing compensation curve of a patient in combination with an audiogram of the patient; carrying out channel-separated hearing compensation on the patient according to the hearing compensation curve, integrating compensated multichannel signals to obtain a compensated useful signal, and providing the useful signal for the patient. The wide dynamic compression method disclosed by the invention has the beneficial effects that, the sound pressure level is thinned in 8 segments to obtain more accurate input/output curves; and the 6-order IIR decomposition synthesis filter bank conforming to human hearing characteristics can be used for obtaining a compensation gain value better conforming to the actual demand of the patient.

Description

technical field [0001] The invention relates to a wide dynamic compression method for a digital hearing aid, in particular to a wide dynamic compression method for a digital hearing aid based on sound pressure level segmentation. Background technique [0002] Loudness compensation technology is one of the core and most important functions of digital hearing aids. Its purpose is to compensate for the missing speech information of hearing-impaired patients and improve patients' understanding of speech content. On the one hand, the loudness compensation method should match the sound pressure level of the speech signal to the patient's auditory dynamic range according to the patient's hearing threshold, optimum threshold, pain threshold and dynamic range; Depending on the condition of hearing loss, the loudness compensation method also needs to perform different compensations for different frequency signals according to the frequency deficiency of the patient. At present, almos...

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Application Information

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IPC IPC(8): H04R25/00
Inventor 梁瑞宇王青云包永强姜涛蔡毅杰吴振飞
Owner 南京天悦电子科技有限公司
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