Sound projection system

Acoustics – Sound-modifying means – Intensifying horn

Patent

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Details

181159, G10K 1100, G10K 1300

Patent

active

RE0321834

ABSTRACT:
A sound projection system comprising means defining a longitudinally extending acoustic channel which is acoustically open at a front end of the channel and acoustically closed at a rear end and at sides of the channel, a loudspeaker having a cone diaphragm operating into the channel at the rear end of the channel, and a longitudinally extending member mounted within the channel directly in front of, and in alignment with, the loudspeaker so as to restrict the free space within the channel, the cross-sectional area of said member varying along its length.

REFERENCES:
patent: 1690840 (1928-11-01), Round
patent: 1711939 (1929-05-01), Graff
patent: 1767679 (1930-06-01), Hutchison
patent: 1907723 (1933-05-01), Bostwick
patent: 2058208 (1936-10-01), Blattner
patent: 3866710 (1975-02-01), Cesati
J. R. Bost, "A New Type of Tweeter Horn Employs A Piezoelectric Driver".
Electro-Voice, Specifications and Instructions Models T35B, T35 and T350 spec. sheet.
Electro-Voice Engineering Data T-35 VHF Compression Driver spec. sheet.
Wente & Thuras, "A High-Efficiency Receiver for a Horn-Type Loudspeaker of Large Power Capacity", AES Journal, Mar. 1978.
VORTEC HF 3000 Ring Radiator Tweeter spec. sheet.
D.A.S. Mod. K-1 spec. sheet.
Acoustical Engineering, by H. F. Olson, 1975, pp. 212-245.

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