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. 24, 1979
Filed:
Nov. 22, 1977
Michael A Gerzon, Oxford, GB;
National Research Development Corporation, London, GB;
Abstract
A basic decoder designed to feed signals to at least three loudspeakers disposed at respective azimuths around a reference point at equal distances therefrom is modified to make it suitable for feeding loudspeakers at the same azimuths but at non-uniform distances from the reference point. Each output of the basic decoder is subject to a time delay proportional to the difference of time of travel of sound from the first pair of loudspeakers to the reference point and the time of travel of sound from the second pair of loudspeakers to the reference point, divided by the sum of said times of travel to an adder connected between the first velocity signal input and the corresponding high-pass filter.