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:
May. 12, 1998
Filed:
Dec. 30, 1996
Douglas S Brungart, Salem, NH (US);
Other;
Abstract
A simplified, low-cost analog system for displacing the perceived source of a stereophonic studio signal from an inherent location within the listener's head to selected fixed alternate locations such as thirty degrees on either side of and a few feet in front of the listener. The disclosed system employs selected analog filters including ear canal resonance-simulating pinna related filters and signal delaying multiple poled Bessel filters to displace the apparent sound source to the predetermined external locations. The audio filter elements are preferably implemented with operational amplifiers with the pinna related filter enhancing frequencies around 5 KHz, and with the output of the pinna related filter being sent directly to one audio channel, and the output of the delay filter is sent to the other channel. Two signal channels can be processed simultaneously using a symmetrical circuit for the other input channel and mixing together the outputs. Both use of pinna related filtering in each channel of the system and dual benefit use of a Bessel function based delay are believed notable aspects of the invention.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile