A speech enhancement system using binaural hearing aids and an external microphone
| Autor: | Henning Puder, Rainer Martin, Dianna Yee, Homayoun Kamkar-Parsi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Voice activity detection
Computer science Microphone Speech recognition 020206 networking & telecommunications 02 engineering and technology Filter (signal processing) Transfer function Speech enhancement 030507 speech-language pathology & audiology 03 medical and health sciences Noise ComputerSystemsOrganization_MISCELLANEOUS Noise-canceling microphone 0202 electrical engineering electronic engineering information engineering 0305 other medical science Binaural recording |
| Zdroj: | ICASSP |
| Popis: | This paper presents a strategy for using an external microphone for enhancing noisy speech in single-microphone completely-in-canal (CIC) hearing aids. The external microphone is placed such that it benefits from the body shielding noise from the back hemisphere. The presented algorithm first enhances the external microphone signal without assuming an exact known location of the external microphone. The proposed algorithm then automatically incorporates the enhanced external microphone signal for post-processing enhancement of a conventional dual-channel binaural beamformer whenever the external microphone has a significant SNR advantage. The overall enhancement scheme avoids error-prone estimations of target voice activity detection and relative transfer functions between the microphones. Unlike single-channel post-processing filters which are limited to reducing stationary or diffuse noise, the proposed postprocessing filter is able to reduce highly non-stationary directional noise from the back hemisphere. The resulting system provides enhancement even for noise arriving from the backward direction, which conventionally is difficult for CIC hearing aids where there exists a front-back ambiguity. |
| Databáze: | OpenAIRE |
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