Mitsubishi Electric Telecom Europe

Lionel Cimaz

Laurent Steenackers

Christian Bernard Gautier

Philippe Organo

The electrical apparatus ( ) in particular a telephone comprises a box ( ) and an electro-acoustic transducer ( ) disposed in said box ( ). Said box ( ) comprises a bearing zone ( ) supporting an ear of a user, said bearing zone ( ) comprising an exit aperture ( ) of said electro-acoustic transducer ( ). Said box ( ) furthermore comprises a decompression aperture ( ) made through said bearing zone ( ). The electrical apparatus ( ) comprises an essentially sealed resonant enclosure ( ), inside which is disposed said electro-acoustic transducer ( ). Said enclosure ( ) comprises an interference aperture ( ) made through a wall ( ) of said enclosure, and a leakage aperture ( ) linking said rear volume ( ) to the outside. Said interference aperture ( ) emerges through said bearing zone ( ). Said leakage aperture ( ) emerges through a zone separate from said bearing zone ( ). Said decompression aperture ( ) emerges outside said enclosure ( ).

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Servon sur Vilaine, France

Lionel Cimaz