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. 27, 1998
Filed:
Apr. 05, 1993
Applicant:
Inventors:
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03G / ; H03G / ;
U.S. Cl.
CPC ...
381 97 ; 381 98 ; 381 61 ;
Abstract
A speaker system for reproducing a high fidelity sound field. In one embodiment, the speaker system includes at least two speakers, one of which is coupled with a phase shifter for shifting the phase of an audio signal in mid- and high-frequency ranges. The phase shifter shifts the phase between .+-.120.degree. and .+-.180.degree.. In another embodiment, the speaker system includes three speakers and the phase shifter shifts the phase of the audio signal applied to two of the speakers from that of the audio signal applied to the third speaker which is a tweeter.