Exponential folded horn speaker enclosure

Details Exponential folded horn speaker enclosure Exponential folded horn speaker enclosure

1980-07-01

1981-11-10

Franklin, Lawrence R.

Acoustics

Plural diaphragm sound sources

181182, 181184, 181188, 181199, H05K 500, G10K 1100

Patent

active

042993040

ABSTRACT:
An exponential folded horn loudspeaker enclosure is built so that all of its components are coaxial with respect to a line that is equidistant from three cooperating surfaces, including floor or ceiling, as well as the customary two walls of a corner. Perfect symmetry with all three cooperating surfaces permits a smooth transition to these surfaces, so that they become a balanced extension of the exponential horn, more than doubling its effective length. Approaching the configuration of a large ideal horn, this geometry is uniquely free of discontinuities and artificial resonances that are needed in other enclosures for boosting low frequency response; therefore, efficiency and fidelity of low frequency response are greatly increased over other enclosures of comparable size.

REFERENCES:
patent: 2146325 (1939-02-01), Allison
patent: 2224919 (1940-12-01), Olson
patent: 2310243 (1943-02-01), Klipsch
patent: 2878887 (1959-03-01), Potter
patent: 3326321 (1967-06-01), Valuch
patent: 3923124 (1975-12-01), Hancock
patent: 4083426 (1978-04-01), Peugh
patent: 4146111 (1979-03-01), Mae et al.
patent: 4173266 (1979-11-01), Pizer et al.

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