Sound-reproducing transducer

Details Sound-reproducing transducer Sound-reproducing transducer

H - Electricity

04

R

H04R 1/02 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2533290

The invention relates to a sound-reproducing transducer (60) connected to a printed circuit (50). This transducer (60) has the shape of a hollow cylinder whose cylindrical wall (66) delimits two circular faces, one front face (66c) and one rear face (66d) that are opposed and planar. The transducer (60) comprises at least one diaphragm (64) that makes it possible to convert electric signals into sound waves and conversely. This diaphragm (64) is a circular membrane parallel to the front face (66c) and rear face (66d) of the transducer (60). The diaphragm (64) delimits two distinct volumes in the transducer (60), the first volume being bordered on one side by the circular face (66c) of the transducer (60) and on the other by the diaphragm (64) while forming a front acoustic cavity (61), and the second volume being bordered on one side by the circular face (66d) of the transducer (60) and on the other by the diaphragm (64) while forming a rear acoustic cavity (62). The invention is characterized in that the cylindrical wall (66) of the transducer (60) has at least one perforation (72, 74, 76, 77, 78).

Transducteur de restitution de sons (60) connecté à un circuit imprimé (50), le transducteur (60) ayant la forme d~un cylindre creux dont la paroi cylindrique (66) délimite deux faces circulaires, une face avant (66c), une face arrière (66d) opposées et planes, le transducteur (60) comprenant au moins un diaphragme (64) permettant de convertir en ondes acoustiques des signaux électriques et inversement, le diaphragme (64) étant une membrane circulaire parallèle aux faces avant (66c) et arrière (66d) du transducteur (60), le diaphragme (64) délimitant deux volumes distincts dans le transducteur (60), le premier volume, bordé d~un côté par la face circulaire (66c) du transducteur (60) et de l~autre par le diaphragme (64), étant une cavité acoustique avant (61), et le deuxième volume, bordé d~un côté par la face circulaire (66d) du transducteur (60) et de l~autre par le diaphragme (64), étant une cavité acoustique arrière (62), caractérisé en ce que ladite paroi cylindrique (66) du transducteur (60) présente au moins une perforation (72, 74, 76, 77, 78).

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