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:
Aug. 25, 2015
Filed:
Apr. 26, 2010
Satoshi Miyata, Kobe, JP;
Toshimitsu Suetsugu, Kobe, JP;
Satoshi Miyata, Kobe, JP;
Toshimitsu Suetsugu, Kobe, JP;
TOA Coporation, Hyogo, JP;
Abstract
To provide a speaker device that can form a substantially uniform sound field over a range from a long distance to a short distance without significantly increasing a calculation load. A plurality of FIR filterstoperform delay control of respective speakers so as to increase a delay time difference between adjacent speakerstoin a line array speakertoward one end of the line array speaker, and thereby over a wide range from a long distance to a short distance, a sound filedis formed. Also, by adding a common shift delay time Dc to filter coefficients for the FIR filtersto, the delay time difference between adjacent speakerstois made less than a sampling period of a sound signal to form a wide and uniform sound field