Directional loudspeaker

Details Directional loudspeaker Directional loudspeaker

1981-03-27

1982-08-17

Hartary, Joseph W.

Acoustics

Sound-modifying means

Intensifying horn

181192, G10K 1102

Patent

active

043445047

ABSTRACT:
A loudspeaker having uniform horizontal sound dispersion characteristics in a design angle and minimal sound dispersion vertically comprises multiple sound energy sources forming an elongated line source of sound energy, and a waveguide having an elongated input portion coextensive with the elongated line source and substantially planar side walls defining an expanding cross-section from the input portion to an exit aperture, whereby sound dispersion in a direction parallel to the line source is minimized. The waveguide expands substantially only in a direction perpendicular to the line source, the rectangular input portion having substantially the same dimension as the exit aperture measured in the direction parallel to the line source.

REFERENCES:
patent: 1791171 (1931-02-01), Thorington
patent: 1874733 (1932-08-01), Zwikker
patent: 2690231 (1954-09-01), Levy et al.
patent: 2872516 (1959-02-01), Hoffman
patent: 3477540 (1969-11-01), Rizo-Patron
patent: 3819006 (1974-06-01), Westlund
patent: 4071112 (1978-01-01), Keele, Jr.
patent: 4187926 (1980-01-01), Henricksen et al.
patent: 4280585 (1981-07-01), Nakanishi

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