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An optimal fitting method and system based on sub-bandwidth dynamic range compression

A dynamic range compression, bandwidth technology, used in electrical components, hearing aids, etc.

Active Publication Date: 2017-02-08
欧仕达听力科技(厦门)有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

Therefore, if the fitter only focuses on fitting the target curve, it is possible to debug the WDRC parameter set that is least suitable for hearing-impaired patients within the range

Method used

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  • An optimal fitting method and system based on sub-bandwidth dynamic range compression
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  • An optimal fitting method and system based on sub-bandwidth dynamic range compression

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Embodiment Construction

[0083] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0084] As a specific example, such as figure 2 As shown, the fitting process of hearing-impaired patients is simulated. First, the fitter usually uses a professional audiometer to test the audiogram of the hearing-impaired patient. If the patient has tested the audiogram in a hospital or authority, he can also directly input the audiogram. In the second step, after inputting the audiogram, the fitter will choose a fitting formula to find the target curve and adjust the curve fitting through parameter fitting. At present, the most common fitting formulas are DSL, FIG6, IHAFF, NAL-NL1, NAL-NL2, etc. Finally, the fitter asked the patient to carry the hearing aid, and after confirming that the fitting is suitable for the patient, the parameters were burned into the hearing aid to complete the fitting.

[0085] The present invention uses the audiogra...

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Abstract

The invention relates to the technical field of hearing aids and voice. An optimum fitting method based on the wide dynamic range compression of a sub band, disclosed by the invention, comprises the following steps: calculating an energy spectrum of the sub band by means of three sets of target curves and an adjacent energy transformation spectrum; calculating an average adjacent energy transformation spectrum and total energy transformation amount; calculating transformation amount (UnitVariety) of the unit energy of a single channel; determining a division point of the channel; calculating an energy spectrum of the channel; determining an inflection point of a low-level section, an inflection point of a high-level section, the gain of a WDRC(wide dynamic range compression) low-level section of each channel, a WDRC compression ratio 1 of each channel, and a WDRC compression ratio 2 of each channel. Through the use of the optimum fitting method and system, disclosed by the invention, a target curve output by a mainstream fitting formula can be automatically fitted, the intelligibility of outputted audio is ensured, and better voice intelligibility can be provided under varied voice environments.

Description

technical field [0001] The invention relates to the field of hearing aid speech technology, in particular to an optimal fitting method and system based on sub-bandwidth dynamic range compression. Background technique [0002] With the in-depth understanding of the human body acoustic system and the development of electronic technology, the work of hearing aids is no longer just to amplify the sound to make hearing-impaired patients hear. For different degrees and types of hearing loss, providing the clearest and most comfortable hearing experience to different hearing-impaired patients is the sole goal of the flagship products of various hearing aid companies in the world. Therefore, in addition to developing high-performance hearing aid products, the company also has to train a large number of fitters to distribute to various regions to provide fitting services to patients. Whether the patient can get auditory satisfaction depends largely on the fitting ability of the fitt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R25/00
Inventor 梁维谦薛行栋朴志刚
Owner 欧仕达听力科技(厦门)有限公司
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