Bandpass woofer enclosure with multiple acoustic fibers

Details Bandpass woofer enclosure with multiple acoustic fibers Bandpass woofer enclosure with multiple acoustic fibers

2006-09-05

2006-09-05

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

C381S335000, C381S337000, C381S338000, C181S145000

Reexamination Certificate

active

07103193

ABSTRACT:
A bandpass loudspeaker enclosure having three sub chambers, a first subchamber being a Helmholtz-reflex chamber with a passive acoustic radiator operating in parallel with the transducer, and the remaining two chambers utilizing two passive acoustic radiators to achieve three Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with reduced diaphragm displacement and substantially reduced distortion and pipe resonances above the pass band. A further embodiment provides a reduced lowest frequency vent size for a given low frequency subchamber size and tuning frequency.

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“A Bandpass Loudspeaker Enclosure”, Fincham, L. R., Presented at the 63rdConvention, May 15-18, 1979 Los Angeles.

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