Acoustic Echo Cancelling with Michrophone Arrays

Document type: Researchreports
Full text:
Author(s): Mattias Dahl, Ingvar Claesson
Title: Acoustic Echo Cancelling with Michrophone Arrays
Series: Research Report
Year: 1995
Issue: 3
ISSN: 1103-1581
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: This report describes a novel method to perform acoustic echo cancelling with microphone arrays. The method employs a digital self-calibrating microphone system.
The on-site calibration process is a simple indirect calibration which adapts in each special case to the environment and electronic equipment. The method also continuously takes into account environmental disturbances such as car engine noise
and fan noise. The method is primarily aimed at handsfree mobile telephones, by suppressing the handsfree loudspeaker and car noise simultaneously. The report
also contains an extensive evaluation in a car.
Subject: Signal Processing\Speech Enhancement
Keywords: Microphone array, adaptive filtering
URN: urn:nbn:se:bth-00029