Universal-type hearing-aid function initial amplification curve and filter parameter collocation method
A technology of filter parameters and configuration methods, applied in hearing aids, transducer circuits, sensors, etc., can solve the problems of inaudible, inaudible, unable to set the amplification curve, etc., to achieve good speech intelligibility and simple operation Effect
Inactive Publication Date: 2012-07-25
嘉兴益尔电子科技有限公司
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Problems solved by technology
[0004] What the present invention aims to solve is that it is not possible to set an amplification curve at different frequencies according to the hearing loss during the amplification compensation of the existing hearing aids, which leads to the "hearing can be seen but not clear" when listening to the amplified sound of common electronic products. result
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[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0039] figure 1 Shown is a flow chart of a general-purpose hearing aid function initial amplification curve and filter parameter configuration method according to the present invention, and the specific steps include:
[0040] 101. Calculate the pure tone air conduction hearing thresholds of three typical hearing loss.
[0041] Based on a large number of pure tone air conduction threshold data of hearing loss, the pure tone air conduction threshold diagrams that can represent mild, moderate and severe hearing loss are obtained according to statistical methods, and objectively represent the degree of common hearing loss.
[0042] 102. Prescription formula calculates compensation curve.
[0043] According to the pure tone air conduction thresholds of three typical hearing loss statistics in 101, the corresponding hearing compensation curve is c...
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The invention provides a universal-type hearing-aid function initial amplification curve and filter parameter collocation method, which comprises the following steps of: making statistics on pure tone conductance threshold audiogram representing mild, moderate and severe hearing losses according to a great deal of pure tone conductance hearing threshold data of hearing losses first; then, calculating to obtain a corresponding hearing compensation curve as an initial amplification curve by using common prescription formulas, such as NAL-RP (National Acoustics Laboratories-Revised Profound); and obtaining a standard frequency response of a filter by linear interpolation, and further designing parameters of an FIR (Finite Impulse Response) filter by using a window function method. The universal-type hearing-aid function initial amplification curve and filter parameter collocation method is suitable for a majority of common hearing loss patients, is easy to implement in many common hearing-related signal processors, is free of complex and time-consuming hearing detection, is simple to operate because switchover is only carried out among three filters, can be used for compensating the hearing loss and can gain better speech articulation.
Description
technical field [0001] The invention relates to the field of hearing aids, in particular to a general-purpose hearing aid function initial amplification curve and a filter parameter configuration method. The invention analyzes the initial amplification settings of three typical hearing impairment situations, and guides the filter for simulation and engineering applications parameter configuration. The invention can be widely applied to the hearing compensation module of the hearing aid function equipment. Background technique [0002] Common hearing loss is mainly reflected in the increase of the patient's minimum detectable sound sound pressure level. And this loss can be different at each sound frequency. Therefore, in any hearing aid amplification compensation, it is necessary to set an amplification curve at different frequencies according to hearing loss. Otherwise, if you just increase the volume, it will cause the result of "you can hear it, but you can't hear it c...
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Inventor 范雪莉曾凡彬陈友元张朝英
Owner 嘉兴益尔电子科技有限公司