H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 1/34 (2006.01) H04R 1/28 (2006.01)
Patent
CA 2369392
A sounder is disclosed which has walling (36, 38) defining a first air column (26) leading to a first sound aperture (34) through which the first column opens to atmosphere, and walling (40, 44) defining a second air column (60) leading to a second sound aperture (64) through which the second column opens to atmosphere. A diaphragm (16) is between the air columns and means are provided for causing said diaphragm to vibrate.
L'invention concerne une sonnerie comportant des parois (36, 38) définissant une première colonne (26) d'air conduisant à une première ouverture (34) sonore par laquelle la première colonne débouche sur l'environnement ambiant, et des parois (40, 44) définissant une seconde colonne (60) d'air conduisant à une seconde ouverture (64) sonore par laquelle la seconde colonne débouche sur l'environnement ambiant. Une membrane (16) est disposée entre les deux colonnes d'air, et des moyens permettent de faire vibrer ladite membrane
Gsbs Development Corporation
Robic
LandOfFree
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