A Multichannel Compression Strategy for a Digital Hearing Aid
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97) -Volume 1 - Volume 1
QRD-based unconstrained optimal filtering for acoustic noise reduction
Signal Processing
Signal processing in high-end hearing aids: state of the art, challenges, and future trends
EURASIP Journal on Applied Signal Processing
Multichannel dynamic-range compression using digital frequency warping
EURASIP Journal on Applied Signal Processing
An intrinsically digital amplification scheme for hearing aids
EURASIP Journal on Applied Signal Processing
Effects of instantaneous multiband dynamic compression on speech intelligibility
EURASIP Journal on Applied Signal Processing
EURASIP Journal on Advances in Signal Processing - Special issue on digital signal processing for hearing instruments
The acoustic and peceptual effects of series and parallel processing
EURASIP Journal on Advances in Signal Processing - Special issue on digital signal processing for hearing instruments
GSVD-based optimal filtering for single and multimicrophone speech enhancement
IEEE Transactions on Signal Processing
Hi-index | 0.08 |
Noise reduction (NR) and dynamic range compression (DRC) are basic components in hearing aids, but generally these components are developed and evaluated independently of each other. Hearing aids typically use a serial concatenation of NR and DRC. However, the DRC in such a concatenation negatively affects the performance of the NR stage: the residual noise after NR receives more amplification compared to the speech, resulting in a signal-to-noise-ratio (SNR) degradation. The integration of NR and DRC has not received a lot of attention so far. In this paper, a multi-channel Wiener filter (MWF)-based approach is presented for speech and noise scenarios, where an MWF-based NR algorithm is combined with DRC. The proposed solution is based on modifying the MWF and the DRC to incorporate the conditional speech presence probability in order to avoid residual noise amplification. The goal is then to analyse any undesired interaction effects by means of objective measures. Experimental results indeed confirm that a serial concatenation of NR and DRC degrades the SNR improvement provided by the NR, whereas the combined approach proposed here shows less degradation of the SNR improvement at a low increase in distortion compared to a serial concatenation.