Related Experiment Videos
Adaptive noise suppression for a dual-microphone hearing aid
Jan Wouters1, Jeff Vanden Berghe, Jean-Baptiste Maj
1Lab. Exp. ORL, K.U. Leuven, Belgium. Jan.Wouters@uz.kuleuven.ac.be
International Journal of Audiology
|October 31, 2002
Summary
This study optimized an adaptive beamformer for hearing aids to improve speech clarity in noisy environments. Results show a significant 11.3 dB improvement in speech reception, aiding hearing-impaired individuals.
Area of Science:
- Audiology
- Signal Processing
- Biomedical Engineering
Background:
- Hearing aids often struggle with speech intelligibility in noisy environments.
- Adaptive beamforming offers a potential solution for noise reduction.
- Previous noise reduction schemes provide a basis for current optimization.
Purpose of the Study:
- To optimize an adaptive beamformer for dual-microphone hearing aids.
- To enhance speech intelligibility in the presence of noise.
- To evaluate the real-time implementation on a wearable digital signal processing (DSP) platform.
Main Methods:
- An adaptive beamformer algorithm was optimized based on Vanden Berghe and Wouters (1998).
- Real-time signal processing was implemented on the Audallion DSP platform.
- Speech-in-noise intelligibility tests were conducted with normally-hearing and hearing-impaired subjects.
Main Results:
- A significant speech reception threshold improvement of 11.3 dB was achieved.
- The improvement was observed in a moderately reverberant environment.
- Effectiveness was demonstrated against steady speech-weighted noise or multi-talker babble from a 90-degree direction.
Conclusions:
- The optimized adaptive beamformer effectively enhances speech intelligibility in challenging acoustic conditions.
- The real-time DSP implementation is viable for wearable hearing aid devices.
- This technology shows promise for improving the quality of life for hearing-impaired individuals.