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:
Sep. 24, 1991
Filed:
Aug. 21, 1990
Tooru Sasaki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An apparatus and method for producing an output signal representing a sound pressure at a predetermined position wherein a first microphone is provided for producing a first output signal representing a sound pressure P.sub.0 at a first position; a second microphone is provided for producing a second output signal representing a sound pressure P.sub.1 at a second position; and a signal processing circuit is provided for producing the output signal based upon the first output signal and the second output signal; wherein the signal processing circuit is operative to produce the output signal proportional to: (i) a power function of the second output signal based on an exponent m corresponding to a distance between the first microphone and the predetermined position, multiplied by (ii) a power function of the first output signal based on an exponent representing a value obtained by subtracting at least the exponent m of the power function of the second output signal from 1.