Acoustics – Plural diaphragm sound sources
Patent
1982-04-19
1984-08-21
Hix, L. T.
Acoustics
Plural diaphragm sound sources
181155, H05K 500
Patent
active
044665059
ABSTRACT:
High fidelity combination of low-bulk bass signal reproducer with novel upper range reproducer. Bass reproducer is box whose height, width and depth are each between about 15 and about 21 inches, the interior of the box housing a pair of woofer loudspeakers in face-to-face relation, their cones being linked together and the speakers being inter-connected so that they are dynamically driven in oppositely phased relation, the cone frames having side windows that pass sound generated by the cones, the box having on one side an essentially direct mouth permitting the direct radiation of the sound passed by one speaker frame, and the box also having on a different side a baffled outlet for discharging the sound passed by the other speaker frame through a passive resonator that preferentially passes the lowest frequencies. Upper range reproducer has a loudspeaker cone suspended for vibration in a frame mounted in an essentially closed shallow box the face panel of which extends at least about 7 inches out from the cone for at least 270.degree. of the cone periphery, a tweeter is mounted in the baffle adjacent the mid-range loudspeaker, the shallow box enclosing the back waves of the upper range loudspeaker and of the tweeter and being essentially free of vibratory response to sound frequencies higher than about 200 hertz.
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Brown Brian W.
Hix L. T,.
Temporal Dynamics Research, Inc.
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