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- Title
Speech enhancement for multimicrophone binaural hearing aids aiming to preserve the spatial auditory scene.
- Authors
Thiemann, Joachim; Müller, Menno; Marquardt, Daniel; Doclo, Simon; van de Par, Steven
- Abstract
Modern binaural hearing aids utilize multimicrophone speech enhancement algorithms to enhance signals in terms of signal-to-noise ratio, but they may distort the interaural cues that allow the user to localize sources, in particular, suppressed interfering sources or background noise. In this paper, we present a novel algorithm that enhances the target signal while aiming to maintain the correct spatial rendering of both the target signal as well as the background noise. We use a bimodal approach, where a signal-to-noise ratio (SNR) estimator controls a binary decision mask, switching between the output signals of a binaural minimum variance distortionless response (MVDR) beamformer and scaled reference microphone signals. We show that the proposed selective binaural beamformer (SBB) can enhance the target signal while maintaining the overall spatial rendering of the acoustic scene.
- Subjects
BINAURAL hearing aids; SPEECH enhancement; AUDITORY scene analysis
- Publication
EURASIP Journal on Advances in Signal Processing, 2016, Vol 2016, Issue 1, p1
- ISSN
1687-6172
- Publication type
Article
- DOI
10.1186/s13634-016-0314-6