Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Patent
1997-12-01
2000-10-17
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
381182, 381186, 381387, 181155, H04R 2500
Patent
active
061343323
ABSTRACT:
A sound lens speaker system includes a concave sound lens, two upper frequency drivers, and a lower mid/low frequency driver. The mid/low frequency driver is oriented to fire sound waves towards the apex of the sound lens. The two high frequency drivers are positioned off axis between the mid/low frequency driver and the apex of the sound lens, and are preferably angled toward the apex of the sound lens. Sound waves from the high frequency drivers and mid/low driver are reflected by the sound lens into a downward substantially focused beam of full frequency spectrum sound. In a preferred embodiment, the sound lens has an upper parabolic portion and a coaxial lower parabolic portion defined by different parabolic equations and each having a respective focus. The high frequency drivers are preferably located along an arc through the upper focus and the mid/low frequency driver is substantially vertically aligned with the lower focus.
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Secret Sound.RTM.- The Unique Directional Speaker System sales brochure from Museum Tools, at least as early as Apr. 1991.
Gallagher Thomas A.
Gordon David P.
Jacobson David S.
Le Huyen
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