A binaural hearing aid fitting method using interaural time difference cues

By using a dual-channel ultrasonic phase difference detection method combined with a machine learning model, high-precision monitoring of hearing aid wearing status was achieved, overcoming the shortcomings of existing tightness detection technologies and improving acoustic performance and user experience.

CN121462965BActive Publication Date: 2026-05-29BOYIN HEARING TECH (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202511639076.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-11
Publication Date
2026-05-29
Estimated Expiration
2045-11-11

AI Technical Summary

Technical Problem

Existing hearing aid fitting tightness detection technology cannot effectively distinguish between "overall too loose" and "unilateral tilting" states, and lacks an effective judgment of "too tight" states, resulting in decreased acoustic performance and user discomfort.

Method used

The dual-channel ultrasonic phase difference detection method is adopted. By placing ultrasonic transducers at different positions on the hearing aid shell, orthogonal coded signals are emitted. An adaptive filter is used to separate the echo signals, extract phase difference, transit time and signal attenuation information, and combine machine learning model to classify the wearing status and trigger adaptive prompt actions.

Benefits of technology

It achieves high-precision, multi-dimensional, real-time online monitoring of hearing aid wearing status, improves acoustic performance and user experience, reduces feedback whistling and ear pressure, and enhances the intelligence level of hearing aids.

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Abstract

The application provides a kind of dual-channel ultrasonic phase difference hearing aid wearing tightness detection method, it is related to hearing aid detection technical field, comprising: control the first ultrasonic wave transmitting transducer and the second ultrasonic wave transmitting transducer of different positions in hearing aid shell, emit the ultrasonic wave signal through orthogonal coding;Mixed echo signal is received by ultrasonic wave receiving transducer, and signal separation is carried out using adaptive filter matched with coding mode, to obtain the first echo signal corresponding to the first transmitting transducer and the second echo signal of the second transmitting transducer;The extracted phase information, time information and amplitude information are input to the pre-trained wearing state classification model, and the classification result of current wearing state is output;According to the classification result, trigger adaptive prompt action matched with state level.The application realizes high-precision, multidimensional, real-time online monitoring and intelligent feedback of hearing aid wearing state.
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