Acoustics – Sound-modifying means – Housing or enclosure
Patent
1975-09-26
1976-09-14
Tomsky, Stephen J.
Acoustics
Sound-modifying means
Housing or enclosure
181148, 181155, 181156, 181160, G10K 1300, H05K 500
Patent
active
039801543
ABSTRACT:
A cabinet for improving the sound output of an amplifier including an upright housing having a horizontal partition dividing the interior of the housing into an upper portion and a lower portion, a speaker mounted in the horizontal partition and oriented for directing sound into the upper portion of the housing, a reflective sounding board positioned within the upper portion of the housing inclined at an angle relative to the horizontal partition, the sounding board being inclined from the lower back to the upper front of the housing dividing the upper portion into a forward and rearward resonance chamber, the sounding board reflecting sound outwardly from the cabinet, the sounding board having an opening therein of an area of one-half to seven-eighths of the vibrational area of the speaker, the opening being covered by a metal plate permitting fast sound transmission between the forward and rearward resonance chambers and a front panel covering the housing upper and lower portion, the upper portion of the front panel having a plurality of openings therein through which both direct and reflected sound emanates from the cabinet.
REFERENCES:
patent: 2811215 (1957-10-01), Rudd et al.
patent: 3777844 (1973-12-01), Johnson
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