Intelligent hearing aid noise reduction method combined with environmental noise evaluation

By identifying the type of environmental noise through noise time-varying index and spectral flatness, and adaptively adjusting the noise reduction parameters based on the user's hearing characteristics, the problem of insufficient adaptability of hearing aids in complex environments is solved, achieving personalized noise reduction effects and improved speech clarity.

CN121811906APending Publication Date: 2026-04-07HEARING EARTH (GUANGZHOU) TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511984316.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-26
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing hearing aid noise reduction technologies are not adaptable enough to complex environments and cannot meet the personalized needs of users, resulting in unsatisfactory noise reduction effects and speech distortion.

Method used

The environmental noise type is identified by two-dimensional features of noise time-varying index and spectral flatness. The noise reduction parameters are adaptively adjusted by combining the environmental noise type and the user's hearing characteristics, and differentiated noise tracking and noise reduction gain processing are adopted.

Benefits of technology

It improves the accuracy of noise classification and environmental adaptability, achieves personalized noise reduction effects, and enhances the noise reduction performance and speech clarity of hearing aids in complex environments.

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Abstract

The invention discloses an intelligent hearing aid noise reduction method combined with environmental noise evaluation, and relates to the technical field of hearing aid signal processing, comprising the following steps: collecting an audio signal and converting the audio signal to a frequency domain to obtain a frequency domain signal; extracting noise features from the frequency domain signal, calculating a noise time-varying index and spectrum flatness, and identifying an environmental noise type; estimating a noise power spectrum, determining a noise tracking parameter according to the environment noise type, and updating the noise power spectrum; calculating a signal-to-noise ratio parameter corresponding to the noise power spectrum, determining a noise reduction intensity factor according to the environmental noise type and the hearing characteristics of the user, and calculating a noise reduction gain based on the signal-to-noise ratio parameter and the noise reduction intensity factor; and performing noise reduction processing on the frequency domain signal by using the noise reduction gain, and converting the frequency domain signal to a time domain to output a processed audio signal. According to the invention, the noise tracking parameter is adaptively adjusted by identifying the environmental noise type, and the noise reduction intensity is determined in combination with the hearing characteristics of the user, so that the noise reduction effect and the user suitability of the hearing aid in a complex environment are improved.
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