Alcatel

Alcatel Business Systems

Denis Abraham

Stephane Dufosse

Didier Beauval

Christian Bourel

A telephone handset includes a housing containing an earpiece part including a piezo-electric disk joined to an electrically conductive support disk, the edge of the support disk being clamped between two holding parts and separating a rear volume from a front volume. The rear volume is delimited by the combination of the piezo-electric disk and its support disk and by a rear wall facing this combination and a circular lateral wall, the rear wall and the lateral wall constituting a rear part with micro-leaks to constitute with the rear volume an acoustic damper device. The front volume, on the other side of the aforementioned combination constitutes, with holes in a wall of the front volume facing the latter combination, a Helmoltz resonator. The housing further contains a board supporting electronic components in direct contact with the rear wall of the rear volume.

Piezo-electric speaker capsule for telephone handset

The telephone handset is provided with at least one piezoelectric transducer (6, 7). The transducer is received in a housing part (2) which includes fixing means for the transducer and its electrical connection means. The housing part is assembled with at least one other complementary part (1) in order to form the handset shell, and it closes the shell locally. An adaptor sleeve makes it possible to replace the piezoelectric transducer by an electromagnetic transducer.

Growing community of inventors

Vanves, France

Denis Abraham