Acoustic Noise and Echo Canceling with Microphone Array

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Mattias Dahl, Ingvar Claesson
Title: Acoustic Noise and Echo Canceling with Microphone Array
Journal: IEEE Transactions on Vehicular Technology
Year: 1999
Volume: 48
Issue: 5
Pagination: 1518-1526
ISSN: 0018-9545
Publisher: Institute of electrical and electronics engineers
City: New York
ISI number: 000082645700022
Organization: Blekinge Institute of Technology
Department: Dept. of Signal Processing (Institutionen för signalbehandling)
Dept. of Signal Processing S-372 25 Ronneby
+46 455 780 00
Authors e-mail:
Language: English
Abstract: A novel method of performing acoustic echo canceling using microphone arrays is presented. The method employs a digital self-calibrating microphone system. The calibration process is a simple indirect on-site calibration that adapts to the particulars of the acoustic environment and the electronic equipment in use. Primarily intended for handsfree telephones in automobiles, the method simultaneously suppresses the handsfree loudspeaker and car noise. The system also continuously takes into account disturbances such as fan noise. Examples from an extensive evaluation in a car are also included. Typical performance results demonstrate 20-dB echo cancellation and 10-dB noise reduction simultaneously.
Subject: Signal Processing\Speech Enhancement
Note: Submitted for publication to IEEE Transactions On Vehicular Technology, December 1996