Exponential horn speaker

Details Exponential horn speaker Exponential horn speaker

1977-11-10

1979-10-23

Tomsky, Stephen J.

Acoustics

Sound-modifying means

Intensifying horn

181195, G10K 1100

Patent

active

041717341

ABSTRACT:
An exponential horn for use in a speaker is provided and includes a horn having a mouth, a throat and horn wall sections connecting the horn mouth and the horn throat. The horn wall sections define a horn whose cross sectional area progressively increases at a selected rate from a value S.sub.o at the horn throat substantially in accordance with the function S(z)=S.sub.o e.sup.mz. S(z) is the cross sectional area measured at any distance z from the horn throat, m is the flare constant defined as 4.pi.f.sub.c /c, where f.sub.c is the cutoff frequency of the horn and is from about 300 Hz to about 500 Hz. The horn mouth is rectangular in shape and has a perimeter substantially equal to one wavelength of the cutoff frequency of the horn. The distance between the horn throat and the horn mouth is from about 10 inches to about 17 inches.

REFERENCES:
patent: 1795936 (1931-03-01), DeForest
patent: 1992268 (1935-02-01), Wente
patent: 2001089 (1935-05-01), Blattner
patent: 2310243 (1943-02-01), Klipsch
patent: 2338262 (1944-01-01), Salmon
patent: 2373692 (1945-04-01), Klipsch
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patent: 2731101 (1956-01-01), Klipsch
patent: 2897292 (1959-07-01), Van Den Bosch
patent: 3930561 (1976-01-01), Klayman
patent: 3935925 (1976-02-01), Koiwa et al.
patent: 3972385 (1976-08-01), Hino et al.

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