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

fYear

1996

fDate

14-15 Mar 1996

Firstpage

15

Lastpage

16

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NEBC.1996.503194

Filename

503194