TELECONFERENCE DEVICE AND SOUND EMISSION/COLLECTION DEVICE

摘要

A teleconference device includes a loudspeaker array and microphone arrays arranged at the both sides of the loudspeaker array. A plurality of focal points are set in front of the respective microphone arrays and symmetrically with respect to the center line of the loudspeaker array. A flux of sound collection beams toward the focal points is outputted. By calculating a difference between the sound collection beams toward the focal points symmetric with respect to the center line, a sound component coming into the microphone from the loudspeaker array SPA is cancelled. Furthermore, a total of squares of wave height value of the difference value for a particular time is used to estimate which of the set focal points is the nearest. Furthermore, by comparing the totals of squares of the wave height values of the sound collection beams toward the focal points symmetric to each other, it is possible to judge the position of the speaker.