Acoustic device

H - Electricity – 04 – R

Patent

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Details

H04R 1/02 (2006.01) H04R 1/24 (2006.01) H04R 1/28 (2006.01) H04R 5/02 (2006.01) H04R 7/04 (2006.01) H04R 7/06 (2006.01) H04R 7/10 (2006.01) H04R 7/20 (2006.01) H04R 7/22 (2006.01) H04R 9/02 (2006.01) H04R 9/06 (2006.01) H04R 17/00 (2006.01) H04R 31/00 (2006.01) B60R 11/02 (2006.01) H04R 3/14 (2006.01) H04R 7/12 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2229998

Acoustic device (81) including a mem- ber (2) extending transversely of its thick- ness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse ex- tent of said member, the member (2) having, by reason of orderly design methodology dis- closed and claimed, a distribution of resonant modes of its natural bending wave vibration at least over said area that is dependent on values of particular parameters of said mem- bers, including geometrical configuration and directional bending stiffness(es), which val- ues have been selected to predetermine said distribution of natural resonant modes being consonant with required achievable acoustic action of said member for operation of said device over a desired operative acoustic fre- quency range.

L'invention concerne un dispositif acoustique (81) doté d'un élément (2) qui s'étend de manière transversale par rapport à l'épaisseur du dispositif et qui peut entretenir des ondes de flexion sur une zone conçue pour être active acoustiquement dans la portion transversale dudit élément. Selon la conception ordonnée aux fins de la présente invention, cet élément (2) présente une distribution des modes résonnants par rapport à la vibration de ses ondes de flexion au moins sur la zone active susmentionnée. Ladite distribution dépend des valeurs de certains paramètres de l'élément en question, y compris la configuration géométrique et la ou les rigidités de flexion directionnelle. On a choisi les valeurs considérées pour déterminer à l'avance la consonance de la distribution des modes résonnants naturels par rapport à la performance acoustique de l'élément, nécessaire au fonctionnement du dispositif sur une gamme de fréquences acoustiques souhaitée à l'utilisation.

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