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Adaptive filters to improve loudspeaker telephone |
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| Authors: | South C.R. Hoppitt C.E. Lewis A.V. |
| Affiliation: | 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: | |