H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 7/10 (2006.01) H04R 19/02 (2006.01)
Patent
CA 2330377
The invention relates to an acoustic element comprising and arbitrary number of layers. Each layer comprises at least one porous layer (2) and a film (4) arranged at a distance from the layer. The porous layer (2) can be electrically conductive or coated at least on one of its surfaces to be electrically conductive, and the film (4) can be charged or provided with at least one electrically conductive surface. The porous layer (2) and the film (4) come into contact with each other substantially only at support points (5). The support points (5) are arranged so as to allow the entire structure to change its thickness.
L'invention concerne un élément acoustique comprenant un nombre arbitraire de couches. Chaque couche comporte au moins une couche poreuse (2) et un film (4) placé à une certaine distance de la couche. La couche poreuse (2) peut être électriquement conductrice ou revêtue sur au moins une de ses surfaces de façon à être électriquement conductrice, le film (4) pouvant être chargé ou pourvu d'au moins une surface électriquement conductrice. La couche poreuse (2) et le film (4) n'entrent en contact qu'au niveau de points de support (5). Ces points de support (5) sont conçus de manière à permettre à toute la structure de changer d'épaisseur.
Panphonics Oy
Sim & Mcburney
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