| 摘要 |
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 ( 66 c) and one rear face ( 66 d) 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 ( 66 c) and rear face ( 66 d) 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 ( 66 c) 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 ( 66 d) 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 ).
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