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:
Mar. 21, 1989
Filed:
Feb. 04, 1987
Masahiro Hibino, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A sound field producing apparatus operatively connected to a stereophonic sound source and adapted to supply audio signals to a loudspeaker system, comprising an indirect sound extracting circuit for extracting indirect sound components by extracting a difference signal representing the difference between right and left input signals. The difference signal is phase-inverted to obtain an inverted difference signal. Two mixing circuits are provided for mixing the right and left input signal, the difference signal and the inverted difference signal to supply mixed signals. Loudspeakers are disposed on the right and left both in front of and to the rear of a listener and are driven by the mixed signals from the mixing circuits.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile