Acoustically asymmetric bandpass loudspeaker with multiple...

H - Electricity – 04 – R

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H04R 25/00 (2006.01) G10K 11/00 (2006.01) H03B 29/00 (2006.01) H04R 1/28 (2006.01) H05K 5/00 (2006.01)

Patent

CA 2400423

In the preferred embodiment, a bandpass loudspeaker enclosure (10) includes three sub chambers (21, 22, 23), a first one being a non-Helmholtz-reflex chamber of a sealed acoustic suspension construction, and the remaining two chambers utilizing two passive acoustic radiators (30, 31) to achieve two Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with a substantially second order high pass characteristic combined with an extended, steeper, at least 4th order slope low pass stop band characteristic.

Dans un mode de réalisation préféré, une enceinte acoustique à bande passante (10) comprend trois sous chambres (21, 22, 23), une première étant une chambre reflex non-Helmholtz de construction à suspension acoustique scellée, et les deux chambres restantes utilisent deux éléments rayonnants acoustiques passifs (30, 31) afin de pouvoir accorder les deux chambres reflex d'Helmholtz par aération et plusieurs filtres acoustiques passe-bas fournissant une bande passante acoustique avec une caractéristique passe-haut sensiblement de second ordre combinée à une caractéristique de bande d'arrêt passe-bas étendue et plus escarpée de pente de quatrième ordre au moins.

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