The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2008
Filed:
Aug. 27, 2003
Hirofumi Nakajima, Tokyo, JP;
Shinji Ohashi, Tokyo, JP;
Hideo Tsuru, Tokyo, JP;
Hiroshi Ohyama, Tokyo, JP;
Takaaki Yamanaka, Tokyo, JP;
Hirofumi Nakajima, Tokyo, JP;
Shinji Ohashi, Tokyo, JP;
Hideo Tsuru, Tokyo, JP;
Hiroshi Ohyama, Tokyo, JP;
Takaaki Yamanaka, Tokyo, JP;
Nittobo Acoustic Engineering Co. Ltd, Tokyo, JP;
Abstract
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 () are arranged on the surface of a baffle () of a shape such as a sphere and polyhedron so that sound from all directions are acquired. A calculation device () calculates the amplitude characteristic and the phase characteristic of acoustic signals acquired by the microphones (). 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 (), 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.