| 摘要 |
PROBLEM TO BE SOLVED: To adjust the speech speed, while making a voice switch operate normally, without echo suppression amount decrease due to an echo canceler. SOLUTION: This loudspeaker call device is provided with a speech speed converting part 4 between the voice switch 10 and a second echo canceler 30B. Consequently, a reception speech signal whose speech speed has been adjusted by the speech speed converting part 4 is input to the voice switch 10 and a first echo canceler 30A, to thereby prevent a change in the speech speed of the reception speech signal from having influence on the suppression processing of echo and howling. As a result, it is possible to adjust the speech speed, while making the voice switch 10 normally operate, without reducing the echo suppression amount by the first echo canceler 30A. COPYRIGHT: (C)2009,JPO&INPIT
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