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:
Apr. 03, 2012
Filed:
Feb. 23, 2006
Yusuke Konagai, Hamamatsu, JP;
Susumu Takumai, Hamamatsu, JP;
Yusuke Konagai, Hamamatsu, JP;
Susumu Takumai, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
Signals on respective RL, FL, C, FR, RR channels are divided into high frequency signals and low frequency signals by HPFs and LPFs respectively. The low frequency signals on the RL, FL, and C channels are superposed and output from a left-side woofer-, while the low frequency signals on the RR, FR, and C channels are superposed and output from a right-side woofer-. A predetermined directivity is given to the high frequency signals on respective channels by directivity controlling portions-to-respectively, and resultant signals are output from respective speaker units-to-of an array speaker to generate virtual sound sources by the reflection from wall surfaces. A crossover frequency fof the rear channels (RL, RR) is set higher than a crossover frequency fof the front channels (FL, FR), and the signals on the rear channels are shaped into a narrow beam to generate a high-quality surround sound field.