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. 19, 1996
Filed:
Dec. 28, 1993
Applicant:
Inventor:
Christian Gulli, St Medard en Jalles, FR;
Assignee:
Sextant Avionique, Meudon la Foret, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381 92 ;
Abstract
A sound pick-up operation is carried out by means of at least four microphones positioned in a plane before the speaker, linear combinations are formed by additions and subtractions of the signals from these microphones and certain of these combinations are used as noise-only sources to process them by an adaptive vector filter to produce an estimation of the noise that is subtracted from the noisy signal.