Post-Filter Design for Superdirective Beamformers with Closely Spaced Microphones
Löllmann H, Vary P (2007)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2007
Pages Range: 291–294
Event location: New Paltz
Abstract
In this paper, the post-filter design for superdirective beamformers with small microphone arrays is investigated, which can be used for speech enhancement systems in mobile communication devices or digital hearing aids. It is shown that coherent noise sources can be well suppressed by a multi-channel controlled post-filter. However, a sufficient suppression of diffuse noise sources can not be achieved by this. Such noise can be further reduced by a single-channel controlled post-filter. This combined post-filter design leads to a significantly better speech quality compared to the related approach of Le Bouquin et al.
Authors with CRIS profile
How to cite
APA:
Löllmann, H., & Vary, P. (2007). Post-Filter Design for Superdirective Beamformers with Closely Spaced Microphones. In Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) (pp. 291–294). New Paltz, US.
MLA:
Löllmann, Heinrich, and Peter Vary. "Post-Filter Design for Superdirective Beamformers with Closely Spaced Microphones." Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), New Paltz 2007. 291–294.
BibTeX: Download