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. 06, 2001
Filed:
Jan. 09, 1998
Applicant:
Inventors:
Mathias Fink, Meudon, FR;
Jacques Lewiner, Saint-Cloud, FR;
Assignee:
Societe pour les Applications du Retournement Temporel, Suresnes, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 2/900 ; A61F 1/106 ; G10K 1/116 ;
U.S. Cl.
CPC ...
H03B 2/900 ; A61F 1/106 ; G10K 1/116 ;
Abstract
Public announcements are made in a space using n speakers after having determined the impulse response h,(t) between a plurality of calibration points j belonging to the space and each speaker i. To transmit an information-bearing acoustic signal S(t) through at least one target area in the space in which announcements are to be made, each speaker i is made to transmit a signal (a), where j is an index representing calibration points in the target area.