Loudspeaker having sound funnelling element

Details Loudspeaker having sound funnelling element Loudspeaker having sound funnelling element

1974-03-19

1976-02-24

Brown, Thomas W.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179116, 181163, 181173, H04R 712

Patent

active

039405761

ABSTRACT:
An elliptically tapered tube or funnel shaped element is fixed to a loudspeaker so that its large diameter end overlies a central region of the loudspeaker diaphragm and such that its small diameter end extends away from the diaphragm. The loudspeaker diaphragm need not extend beyond the line on which it is connected to the funnel element, but does in the preferred embodiment. The funnel element has a cross-sectional shape that differs on planes parallel to the plane of the base which lie at different distances from the base. A funnel that is circular in cross-section at all of those parallel planes does not exhibit high fidelity response with the brilliance and clarity that distinguishes speakers having the non-uniform cross-sectional shape.

REFERENCES:
patent: 1673939 (1928-06-01), Farrand
patent: 2034882 (1936-03-01), Scribner
patent: 2852089 (1958-09-01), Cohen et al.
patent: 3310131 (1967-03-01), Ward

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