Adaptive microphone array employing calibration signals: an analytical evaluation

Author

Nordholm, Sven ; Claesson, Ingvar ; Dahl, Mattias

Author_Institution

Dept. of Signal Process., Karlskrona/Ronneby Univ., Sweden

Volume

7

Issue

3

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

241

Lastpage

252

Abstract

This paper gives an analytical description of an adaptive microphone array that facilitates a simple built-in calibration to the environment and instrumentation. This method, suggested for use in hands-free mobile telephones and speech recognition systems for cars, provides speech enhancement and acoustic echo-cancellation. The scheme offers several advantages, such as a simple calibration procedure, suppression of directional sources, versatile robust beamforming, and reduced target signal distortion. The analysis employs noncausal Wiener filters yielding compact and effective theoretical suppression limits

Keywords

Wiener filters; acoustic signal processing; acoustic transducer arrays; adaptive signal processing; array signal processing; calibration; echo suppression; filtering theory; land mobile radio; microphones; noise abatement; speech enhancement; speech recognition; telephone sets; acoustic echo-cancellation; adaptive microphone array; built-in calibration; calibration signals; cars; directional sources suppression; echo suppression; hands-free mobile telephones; instrumentation; noncausal Wiener filters; reduced target signal distortion; robust beamforming; speech enhancement; speech recognition systems; theoretical suppression limits; Adaptive arrays; Array signal processing; Calibration; Echo cancellers; Instruments; Microphone arrays; Robustness; Speech enhancement; Speech recognition; Telephony;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.759030

Filename

759030