Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1975-11-21
1977-06-21
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
179 1E, 181145, 181146, 181147, 181148, 181155, H04R 102, H04R 120, H04R 312
Patent
active
040313182
ABSTRACT:
A high fidelity loudspeaker system involving a multidriver, semi-omnidirectional, full range, electrodynamic loudspeaker including two, separate but complementary, closed box-like enclosures, an upper unit containing an array of mid-range speakers around three sides and a lower unit containing arrays of low and high frequency speakers around three sides. The low frequency speakers (woofers) on their interior sides include a series of tubes opening into the closed interior of the speaker enclosure, having various lengths in accordance with certain relative, locational relationships. Although the low and high frequency speakers include a single crossover frequency circuit, the "mid-range" speakers are not included in any crossover network but are driven throughout the total frequency input range, although a capacitor can be included to cut off the very low frequencies to the mid-range speakers. The number of speakers in the arrays in each unit can be varied, but in the lower unit the over-all speaker panel sizes remain the same with the speaker locations on each panel being made asymmetrical about the horizontal center-line, allowing for alternative, up-or-down placement. A protective outer case about the cabinet can be included having hinged wall sections, which also serve when opened out as reflective surfaces, providing a "built-in corner" (FIG. 10). For easy mobility, a handle and rollers can be provided on the back of the unit (FIG. 9). Terminal strip and electrical hook-ups are provided on the exterior of the speaker allowing flexible application and use (FIGS. 7-7C).
REFERENCES:
patent: 2373692 (1945-04-01), Klipsch
patent: 3637039 (1972-01-01), Raichel et al.
Innovative Electronics, Inc.
Stellar George G.
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