Capacitive sound transducer having a perforated attenuation...

H - Electricity – 04 – R

Patent

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Details

IPC codes

H04R 19/01 (2006.01) H04R 1/38 (2006.01)

Type

Patent

Patent number

CA 2622035

Description

The invention relates to a capacitive sound transducer and a capacitor microphone having such a sound transducer. The sound transducer comprises a diaphragm (3) and a counterelectrode (1), which is arranged at a short distance from the diaphragm (3) and has a first perforation (2). In order to attenuate natural oscillations of the diaphragm (3) at high frequencies, a capacitive sound transducer is proposed in which a sound-permeable attenuation disc (7) is arranged at a short distance from the diaphragm (3) and opposite the counterelectrode (1), which attenuation disc has a second perforation (8). In addition, in this case the first perforation (2) and the second perforation are arranged such that they are offset with respect to one another.

L'invention concerne un transducteur acoustique capacitif et un microphone à condensateur doté d'un tel transducteur acoustique. Le transducteur acoustique comprend une membrane (3) et une contre-électrode (1) placée à une faible distance de la membrane (3) et présentant une première perforation (2). Pour amortir les vibrations propres de la membrane (3) pour des fréquences élevées, on utilise un transducteur acoustique capacitif dans lequel un disque d'amortissement (7) perméable au son est placé à une faible distance de la membrane (3) à l'opposé de la contre-électrode (1) et présente la deuxième perforation (8). Selon l'invention, la première perforation (2) et la deuxième perforation sont décalées.

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