Theoretical Analysis of Binaural Multimicrophone Noise Reduction Techniques

Binaural hearing aids use microphone signals from both left and right hearing aid to generate an output signal for each ear. The microphone signals can be processed by a procedure based on speech distortion weighted multichannel Wiener filtering (SDW-MWF) to achieve significant noise reduction in a speech + noise scenario. In binaural procedures, it is also desirable to preserve binaural cues, in particular the interaural time difference (ITD) and interaural level difference (ILD), which are used to localize sounds. It has been shown in previous work that the binaural SDW-MWF procedure only preserves these binaural cues for the desired speech source, but distorts the noise binaural cues. Two extensions of the binaural SDW-MWF have therefore been proposed to improve the binaural cue preservation, namely the MWF with partial noise estimation (MWF-eta) and MWF with interaural transfer function extension (MWF-ITF). In this paper, the binaural cue preservation of these extensions is analyzed theoretically and tested based on objective performance measures. Both extensions are able to preserve binaural cues for the speech and noise sources, while still achieving significant noise reduction performance.

[1]  B Kollmeier,et al.  Real-time multiband dynamic compression and noise reduction for binaural hearing aids. , 1993, Journal of rehabilitation research and development.

[2]  Volker Hohmann,et al.  Strategy-selective noise reduction for binaural digital hearing aids , 2003, Speech Commun..

[3]  S. Soli,et al.  Development of the Hearing in Noise Test for the measurement of speech reception thresholds in quiet and in noise. , 1994, The Journal of the Acoustical Society of America.

[4]  Marc Moonen,et al.  Binaural Noise Reduction Algorithms for Hearing Aids That Preserve Interaural Time Delay Cues , 2007, IEEE Transactions on Signal Processing.

[5]  Marc Moonen,et al.  THEORETICAL ANALYSIS OF BINAURAL CUE PRESERVATION USING MULTI-CHANNEL WIENER FILTERING AND INTERAURAL TRANSFER FUNCTIONS , 2006 .

[6]  Marc Moonen,et al.  Preservation of interaural time delay for binaural hearing aids through multi-channel Wiener filtering based noise reduction , 2005, Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005..

[7]  Jacob Benesty,et al.  New insights into the noise reduction Wiener filter , 2006, IEEE Transactions on Audio, Speech, and Language Processing.

[8]  R. Fletcher.  Practical Methods of Optimization , 1988 .

[9]  Patrick M. Zurek,et al.  Microphone-array hearing aids with binaural output .I. Fixed-processing systems , 1997, IEEE Trans. Speech Audio Process..

[10]  Patrick M. Zurek,et al.  Microphone-array hearing aids with binaural output. II. A two-microphone adaptive system , 1997, IEEE Trans. Speech Audio Process..

[11]  J. Blauert.  Spatial Hearing: The Psychophysics of Human Sound Localization , 1983 .

[12]  Marc Moonen,et al.  Binaural Cue Preservation for Hearing Aids using an Interaural Transfer Function Multichannel Wiener Filter , 2007, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07.

[13]  Marc Moonen,et al.  The effect of multimicrophone noise reduction systems on sound source localization by users of binaural hearing aids. , 2008, The Journal of the Acoustical Society of America.

[14]  Volkmar Hamacher.  Comparison of advanced monaural and binaural noise reduction algorithms for hearing aids , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[15]  Martin Vetterli,et al.  Rate-Constrained Beamforming for Collaborating Hearing Aids , 2006, 2006 IEEE International Symposium on Information Theory.

[16]  Marc Moonen,et al.  Frequency-domain criterion for the speech distortion weighted multichannel Wiener filter for robust noise reduction , 2007, Speech Commun..

[17]  Thomas F. Coleman,et al.  Optimization Toolbox User's Guide , 1998 .

[18]  R Plomp,et al.  The effect of head-induced interaural time and level differences on speech intelligibility in noise. , 1987, The Journal of the Acoustical Society of America.

[19]  Christopher J Darwin,et al.  Contributions of binaural information to the separation of different sound sources , 2006, International journal of audiology.

[20]  Peter Vary,et al.  Dual-Channel Speech Enhancement by Superdirective Beamforming , 2006, EURASIP J. Adv. Signal Process..

[21]  Marc Moonen,et al.  Reduced-Bandwidth and Distributed MWF-Based Noise Reduction Algorithms for Binaural Hearing Aids , 2009, IEEE Transactions on Audio, Speech, and Language Processing.

[22]  Futoshi Asano,et al.  A new adaptive binaural microphone array system using a weighted least squares algorithm , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[23]  Marc Moonen,et al.  Analysis of localization cue preservation by multichannel wiener filtering based binaural noise reduction in hearing aids , 2008, 2008 16th European Signal Processing Conference.

[24]  Marc Moonen,et al.  On the output SNR of the speech-distortion weighted multichannel Wiener filter , 2005, IEEE Signal Processing Letters.

[25]  Marc Moonen,et al.  Speech enhancement with multichannel Wiener filter techniques in multimicrophone binaural hearing aids. , 2009, The Journal of the Acoustical Society of America.

[26]  Douglas L. Jones,et al.  Performance of time- and frequency-domain binaural beamformers based on recorded signals from real rooms. , 2004, The Journal of the Acoustical Society of America.

[27]  de B Bert Vries.  An Integrated Approach to Hearing Aid Algorithm Design for Enhancement of Audibility, Intelligibility and Comfort , 2008 .

[28]  Marc Moonen,et al.  Binaural Multi-Channel Wiener Filtering for Hearing Aids: Preserving Interaural Time and Level Differences , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[29]  A. J. Berkhout,et al.  Design of a broadside array for a binaural hearing aid , 1997, Proceedings of 1997 Workshop on Applications of Signal Processing to Audio and Acoustics.

[30]  Bill Gardner,et al.  HRTF Measurements of a KEMAR Dummy-Head Microphone , 1994 .