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. 05, 1998
Filed:
Jun. 10, 1997
Applicant:
Inventors:
Andre L'Esperance, Sherbrooke, CA;
Martin Bouchard, Sherbrooke, CA;
Bruno Paillard, Sherbrooke, CA;
Catherine Guigou, Christiansburg, VA (US);
Assignee:
Alumax Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
381 715 ; 381 711 ;
Abstract
An active noise control system for effective control of higher order modes of noise propagation within a duct is disclosed. A plurality of error sensors is disposed within an error sensors plane, which plane is perpendicular to the longitudinal axis of the duct. The disclosed process and apparatus minimizes the mean square distance between the points of the area associated to each error sensor. The resulting arrangement of errors sensors optimizes the overall area that the error sensors can control and consequently the global efficiency of the controlling system.