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:
Oct. 10, 1989
Filed:
Oct. 15, 1987
Applicant:
Inventor:
Noboru Tominari, Tokyo, JP;
Assignee:
Dynavector, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04S / ;
U.S. Cl.
CPC ...
381 17 ; 381 63 ;
Abstract
A multi-channel reproducing system comprises main speakers for sounding an input audio signal as a main channel audio signal, a phase shifter supplied with the input audio signal for shifting a phase thereof, and sub-speakers supplied with an output signal from the phase shifter as a sub-channel audio signal for sounding the sub-channel audio signal. The phase shifter has a frequency versus delay time characteristic in which a delay becomes large as the frequency decreases and small as the frequency increases.