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Patent Searching and Data


Title:
BERYLLIUM ACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO2004095881
Kind Code:
A3
Abstract:
Loudspeaker for an acoustic enclosure, notably a tweeter or medium, incorporates a spherical membrane (2) with direct radiation as its dome, with a surface concave with respect to the coil (3) and on which, preferably, is fixed at a certain level of the plane (A-B), for example at mid-height, the mobile coil in order to assure an optimal mechanical coupling capable of reproducing frequencies below 1 kHz with an elevated yield. Independent claims are also included for: (a) fabrication of tweeter or medium domes; (b) a tool for forming thin metal sheets for the fabrication of three dimensional components during the fabrication of these domes; (c) a dome for a loudspeaker of an acoustic enclosure, notably for a tweeter or medium; and (d) an acoustic enclosure incorporating at least one such loudspeaker.

Inventors:
BAKER DOMINIC (FR)
MAHUL JACQUES (FR)
Application Number:
PCT/FR2004/000704
Publication Date:
December 29, 2004
Filing Date:
March 22, 2004
Export Citation:
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Assignee:
FOCAL JMLAB S A (FR)
BAKER DOMINIC (FR)
MAHUL JACQUES (FR)
International Classes:
H04R7/12; H04R31/00; (IPC1-7): H04R31/00
Foreign References:
GB2245591A1992-01-08
US4847981A1989-07-18
Other References:
PATENT ABSTRACTS OF JAPAN vol. 0170, no. 97 (E - 1326) 25 February 1993 (1993-02-25)
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