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Machine translation
1. (WO1979000636) ACOUSTIC PRESSURE(OR CHARGE)REGULATOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000636    International Application No.:    PCT/FR1979/000012
Publication Date: 06.09.1979 International Filing Date: 13.02.1979
IPC:
H04R 1/28 (2006.01)
Applicants:
Inventors:
Priority Data:
7804505 17.02.1978 FR
Title (EN) ACOUSTIC PRESSURE(OR CHARGE)REGULATOR
(FR) REGULATEUR DE PRESSION (OU CHARGE) ACOUSTIQUE
Abstract: front page image
(EN)Device allowing the improvement of the basic technical performances of sound transmitters, particularly the linearity of the amplitude-frequency response characteristic and the range of the pass-band, by automatic control of their acoustic pressure (or charge), and this on all frequency ranges replayed and at any sound power. It includes a filter (1) (see fig. 1) made of elastic and porous material mounted on the opening (2), of appropriate shape and size, drilled through the wall (3) of the compartment (4) of the sound transmitter which is directly pressurized by the membrane (5) of the loudspeaker. This filter is provided with a system which allows to control the density thereof and thus, to keep the pressure (or charge) (7) constant at a set value, letting only the surplus out. The invention can be applied to the production of improved sound transmitters, such as high quality acoustic units, or high performance loudspeakers specialized in the middle and high register (tweeter).
(FR)Dispositif permettant d"ameliorer les performances techniques fondamentales des emetteurs de son, notamment la linearite de la courbe de reponse amplitude-frequence et l"etendue de la bande passante, par autoregulation de leur pression (ou charge) acoustique, cela sur toutes les gammes de frequences reproduites et a n"importe quelle puissance sonore. Il comprend un filtre (1) (voir dessin Fig. 1) en materiau poreux et elastique monte sur l"ouverture (2), de forme et de dimensions appropriees, percee dans la cloison (3) du compartiment (4) de l"emetteur de son qui est directement mis en pression par la membrane (5) du haut-parleur. Ce filtre est muni d"un systeme (6) qui permet de regler sa densite et ainsi, de maintenir la pression (ou charge) (7) constante a une valeur determinee en ne laissant s"echapper que le surplus. L"invention peut etre utilisee pour la fabrication des emetteurs de son perfectionnes, tels que les enceintes acoustiques de haute qualite, ou les haut-parleurs de hautes performances specialises dans le medium et l"aigu (tweeter).
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)