An adaptive noise canceller for hearing aids using two nearby microphones.
An adaptive noise cancellation scheme based on two-stage adaptive filtering as proposed by Van Compernolle [Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (IEEE, New York, 1990)] was tested for two identical directional microphones mounted in an endfire configuration within a single behind-the-ear (BTE) hearing aid. Speech intelligibility tests were carried out with two normal hearing subjects and three hearing aid users with moderate hearing losses, in a realistic test environment using open set words and sentences. A significant improvement, on average more than 5 dB, of speech reception threshold (SRT) in background noise was obtained.
Vanden Berghe
J
J
Lab. Exp. ORL, KULeuven, Belgium.
Wouters
J
J
D000669:Amplifiers, Electronic; D006310:Hearing Aids; D006801:Humans; D009622:Noise; D013067:Speech Perception / Q000502:physiology*; D013069:Speech Reception Threshold Test