Patent
1979-06-05
1981-05-12
Brigance, Gerald L.
179 1GA, H04R 502
Patent
active
042674050
ABSTRACT:
A stereo speaker system adapted for home use is arranged to increase stereo image perception by reducing spurious and confusing sound images. The speaker system includes a pair of low frequency speaker assemblies and a pair of high frequency speaker assemblies. The pair of low frequency speaker assemblies can be constructed along conventional lines although a columnar arrangement of speakers or acoustic transducers is preferred and preferably arranged to handle acoustic energy in a frequency range below 1000 Hz. The remaining portion of the speaker system includes a pair of high frequency speaker assemblies. Each assembly consists of a single column arrangement of a plurality of acoustic transducers or speakers; in one preferred embodiment, 24 high frequency speakers are included. The speakers are mounted in a column with minimum spacing between them; the number of speakers is chosen so that the column will extend substantially between floor and ceiling, with appropriate allowance for pre-existing structures such as baseboards, moldings or baseboard heating apparatus. The column of high frequency speakers is arranged to emit acoustic energy only in a forward direction so as to disperse acoustic energy as a cylindrical wavefront. At the same time, the acoustic energy emitting surfaces of a column of speakers is mounted as closely as possible to a supporting parallel surface such as a wall.
REFERENCES:
patent: 3052758 (1962-09-01), Berry
patent: 3125181 (1964-03-01), Pawlowski
patent: 3138667 (1964-06-01), Avedon
patent: 3299206 (1967-01-01), Klepper
patent: 3308237 (1967-03-01), Novak
patent: 3980829 (1976-09-01), Beveridge
Audio, "Acoustic Matrixing-A Basis For New Loudspeaker Developments", Nov. 1960, pp. 19-21.
Audio Cyclopedia, Howard M. Tremaine, 3-29-77, pp. 1153-1156.
"Columnar Loudspeakers", Industrial Electronic Engineering and Maintenance, Sep. 1962, pp. 22-25, George Riley.
Brigance Gerald L.
McIntosh Laboratory Inc.
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