Title :
Hearing aids: fixed microphone arrays with frequency equalization based on a sliding DFT
Author :
Zhu, Bin ; Micheli-Tzanakou, E. ; Sideman, S.
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Fixed microphone arrays have the ability of spatial filtering in order to cancel any distributed interference. Noise sensitivity constrained by an optimal broadband beamforming provides for more tolerance to uncorrelated noise such as microphone sensor interior noise and environmental competing speech. However, the non-uniform performance of broadband beamforming in the frequency domain, may lead to speech deformation. This paper proposes a frequency equalization method implemented by a sliding DFT array that can be conveniently combined with beamforming
Keywords :
acoustic arrays; acoustic noise; discrete Fourier transforms; frequency-domain analysis; hearing aids; interference suppression; microphones; spatial filters; speech processing; distributed interference; environmental competing speech; fixed microphone arrays; frequency domain; frequency equalization; frequency equalization method; hearing aids; microphone sensor interior noise; noise sensitivity; nonuniform performance; optimal broadband beamforming; sliding DFT array; sliding discrete Fourier transform; spatial filtering; speech deformation; uncorrelated noise; Array signal processing; Filtering; Frequency; Hearing aids; Interference cancellation; Interference constraints; Microphone arrays; Noise cancellation; Speech enhancement; Working environment noise;
Conference_Titel :
Bioengineering Conference, 1996., Proceedings of the 1996 IEEE Twenty-Second Annual Northeast
Conference_Location :
New Brunswick, NJ
Print_ISBN :
0-7803-3204-0
DOI :
10.1109/NEBC.1996.503194
