Title :
Adaptive filters to improve loudspeaker telephone
Author :
South, C.R. ; Hoppitt, C.E. ; Lewis, A.V.
Author_Institution :
Post Office Research Centre, Ipswich, UK
Abstract :
A loudspeaking telephone is under development which uses two adaptive filters to cancel acoustic and electric coupling in an open-loop or shallow voice-switched system. Measurements indicate that between 15 and 30 dB of echo cancellation is available for a range of conditions.
Keywords :
filters; loudspeakers; telephone sets; acoustic coupling; adaptive filters; echo cancellation; electric coupling; loudspeaking telephone; open loop system; shallow voice switched system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19790478
