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:
Jan. 30, 2007
Filed:
Jun. 06, 2003
Jacques Lewiner, Saint-Cloud, FR;
Sylvain Charles Javelot, Paris, FR;
Damien Georges Pierre Lebrun, Houilles, FR;
Stephane Andre Roger Debusne, Montrouge, FR;
Jacques Lewiner, Saint-Cloud, FR;
Sylvain Charles Javelot, Paris, FR;
Damien Georges Pierre Lebrun, Houilles, FR;
Stephane Andre Roger Debusne, Montrouge, FR;
Cynove Sarl, Paris, FR;
Abstract
The invention concerns a method for transmitting in an area () information items in the form of sound waves representing a signal X(t), through a loudspeaker enclosure (), said method comprising a step of setting up a public address system which consists in applying to the input of the loudspeaker enclosure () an electric signal P(t)=W(t) ?X(t) wherein is the convolution product and W(t)=S(−t)? I(t), wherein S(−t) is the temporal return of the pulse response S(t) between the enclosure and the target zone () belonging to the area to be fitted with a P.A. system () t representing time, and I(t) is the temporal response of the product e.Sc (f), wherein f represents the frequency, tis a constant Sc(f)=1/(S(f)), α being a non-null positive number and S(f) being a real function obtained by peak clipping of the modulo I S(f) I of the frequency response S(f) of S(t).