Mid-range loudspeaker assembly propagating forward and backward

Details Mid-range loudspeaker assembly propagating forward and backward Mid-range loudspeaker assembly propagating forward and backward

1989-01-06

1992-07-14

Dwyer, James L.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

381 90, 381150, 381153, 381158, 181175, 181198, 181199, H04R 2500, G10K 1100, A47B 8106

Patent

active

051310520

ABSTRACT:
A loudspeaker assembly includes a vibrating element which generates pressure waves in a first predetermined frequency range which propagate in a first forward direction and a second backward direction. A driver drives the vibrating element. A first diffuser uniformly diffuses the forward waves. A tuner selects back waves in a second predetermined frequency range within said first predetermined frequency range. The tuner includes a second diffuser for diffusing the back waves within said second frequency range such that the selected back waves and the front waves are in phase.

REFERENCES:
patent: 3393766 (1968-07-01), Mitchell
patent: 3688864 (1972-09-01), Guss
patent: 3816672 (1974-06-01), Gefvert
patent: 4144416 (1979-03-01), Babb
patent: 4224469 (1980-09-01), Karson
patent: 4611686 (1986-09-01), Kobayashi et al.
patent: 4620317 (1986-10-01), Anderson
patent: 4753317 (1988-06-01), Flanders
patent: 4819761 (1989-04-01), Dick
patent: 4875546 (1989-10-01), Krnan

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