Binaural Noise Reduction and De-reverberation for Hearing Aids
Summary:
The presence of ambient noise and room reverberation significantly harms the speech intelligibility and the listening comfort of hearing aid users. Existing hearing systems urgently require improvements in the performance and the robustness of their speech enhancement concepts. A first aim of the project is to explore the fundamental limits of noise reduction and de-reverberation under the constraint of binaural microphone placement. We furthermore take the spatial distribution of acoustic sources and the time-variability of the acoustic environment into account. To improve the state-of-the-art, new signal processing concepts will be developed which aim to enhance speech intelligibility and audio perception of hearing aid users.
References:
Enzner, G. (2006): A Model-Based Optimum Filtering Approach to Acoustic Echo Control: Theory and Practice, PhD Thesis, RWTH Aachen University, Wissenschaftsverlag Mainz, Aachen.
Enzner, G., Vary, P. (2006): “Frequency-Domain Adaptive Kalman Filter for Acoustic Echo Control in Hands-free Telephones”, Signal Processing, Elsevier, vol. 86, no. 6, pp. 1140.
Martin, R. (2001): Small Microphone Arrays with Postfilters for Noise and Acoustic Echo Reduction, in: Microphone Arrays, M. Brandstein and D. Ward (eds.), Springer-Verlag
Breithaupt C., Gerkmann, T., and Martin, R. (2007): „Cepstral Smoothing of Spectral Filter Gains for Speech Enhancement without Musical Noise“, IEEE Signal Processing Letters.
