Sound pickup device and voice conference apparatus

H - Electricity – 04 – R

Patent

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Details

H04R 1/40 (2006.01) G10L 21/02 (2006.01)

Patent

CA 2627499

Microphone arrays, which are formed by arranging a plurality of microphones, are provided on a front side and a rear side of a housing, respectively. A virtual focus is set for each of the microphone arrays in a direction opposite to a direction in which sound is picked-up sound signals picked up by the plurality of microphones are delayed such that distances to the virtual focus are the same, and the delayed sound signals are synthesized. Therefore, sound in a sound-pickup area of a predetermined angle on each of the front side and the rear side can be picked up at a high level, and even though there is a noise source in areas other than the sound-pickup area, noise from the noise source is not picked up.

Dans la présente invention, des réseaux de microphones, constitués par l'agencement d'une pluralité de microphones, sont installés respectivement sur un côté avant et un côté arrière d'un logement. Une cible virtuelle est définie pour chaque réseau de microphones dans une direction opposée à celle dans laquelle le son est capté. Les signaux sonores captés par la pluralité de microphones sont retardés de sorte que les distances jusqu'à la cible virtuelle soient les mêmes, et que les signaux sonores retardés soient synthétisés. Ainsi, dans une zone de capture sonore ayant un angle prédéterminé sur le côté avant et le côté arrière, le son peut être capté à un niveau élevé et, même en présence d'une source de bruit venant de zones autres que celle de capture sonore, le bruit émanant de ladite source de bruit ne sera pas capté.

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