Sound source search system

G - Physics – 01 – S

Patent

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Details

G01S 3/80 (2006.01) G01S 3/808 (2006.01) H04R 1/40 (2006.01) H04R 3/00 (2006.01)

Patent

CA 2496785

It is possible to simultaneously identify the sound coming direction from a sound source in all directions and estimate the sound intensity of the sound source. A plurality of microphones (11) are arranged on the surface of a baffle (10) of a shape such as a sphere and polyhedron so that sound from all directions are acquired. A calculation device (40) calculates the amplitude characteristic and the phase characteristic of acoustic signals acquired by the microphones (11). The signal information and information on sound field analysis around the baffle are integrated and calculation to emphasize a sound coming from a particular direction is performed for all the directions so as to identify the sound coming direction from a sound source. According to these calculation results and the distance input by an input device (70), it is possible to estimate the sound intensity of the sound source at a plurality of portions generated at the sound source or boundary surface.

Il est possible d'identifier simultanément la direction de provenance d'un son, à partir d'une source sonore, dans toutes les directions, et d'estimer l'intensité sonore de cette source sonore. Une pluralité de microphones (11) sont agencés à la surface d'une baffle (10) présentant une forme comme une sphère et un polyèdre, de sorte à acquérir les sons provenant de toutes les directions. Un dispositif de calcul (40) permet de calculer l'amplitude caractéristique et la phase caractéristique de signaux acoustiques acquis par les microphones (11). Les informations de signal et les informations concernant l'analyse de champ sonore autour de la baffle sont intégrées et on effectue un calcul permettant d'accentuer une son provenant d'une direction particulière, pour toutes les directions, de sorte à identifier la direction de provenance d'un son, à partir d'une source sonore. En fonction des résultats de ce calcul et de la distance entrée par un dispositif d'entrée (70), il est possible d'estimer, au niveau d'une pluralité de parties, l'intensité sonore de la source sonore générée à la source sonore ou sur une surface limitrophe.

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