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:
Feb. 14, 2012
Filed:
Nov. 20, 2006
Hareo Hamada, Tokyo, JP;
Yoshitaka Murayama, Tokyo, JP;
Akira Goto, Tokyo, JP;
Dimagic Co., Ltd., Tokyo, JP;
Abstract
To provide a sound collection system using a plurality of microphones arranged in the proximity to one another and having an excellent directivity for an arbitrary position in the sound field space. A plurality of control points are set around a plurality of sound collecting microphones. A desired response function matrix A (ω) and a transfer function matrix C (ω) between the control points and the respective microphones are measured. A control filter H arranged in a digital signal processing unit () is connected to each of the microphones constituting the sound collection device (). The control filters H are arranged for the number of output channels of a reproduction unit (). An output of each of the control filters H is added for each channel and outputted to each channel of the reproduction unit (). By specifying a microphone directivity upon sound collection at a control point, the control filters H are decided according to the measured desired response function matrix A (ω) and the transfer function matrix C (ω) of the specified control point.