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:
Jul. 04, 2000
Filed:
Dec. 22, 1997
Jacquelynn Green, Akron, OH (US);
Robert T Green, III, Akron, OH (US);
Tadashi Kikutani, Stow, OH (US);
Audio Technica U.S., Inc., Stowe, OH (US);
Abstract
A directional microphone is disclosed. The shotgun microphone has an elongated tube which is designed to control directivity at frequencies above a predetermined frequency and at least four reference microphones spatially arranged about said shotgun microphone. A signal processor, which is electrically connected to said shotgun and reference microphones, generates interference cancelling signals from the portions of the signals from the reference microphones which have frequencies generally below the predetermined frequency. The signal processor combines the cancelling signals with the signal from the shotgun microphone to generate an output signal in which signals originating from in front of the directional microphone in a direction along the longitudinal axis of said tube are enhanced and signals originating from locations other than in front of the directional microphone in a direction along the longitudinal axis of said tube are suppressed.