Electrical audio signal processing systems and devices – One-way audio signal program distribution
Patent
1996-07-17
1999-03-30
Isen, Forester W.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
381 79, H04B 300
Patent
active
058898700
ABSTRACT:
The present invention is the emission of new sonic or subsonic compression waves from a region resonant cavity or similar of interference of at least two ultrasonic wave trains. In one embodiment, two ultrasonic emitters are oriented toward the cavity so as to cause interference between emitted ultrasonic wave trains. When the difference in frequency between the two ultrasonic wave trains is in the sonic or subsonic frequency range, a new sonic or subsonic wave train of that frequency is emitted from within the cavity or region of interference in accordance with the principles of acoustical heterodyning. The preferred embodiment is a system comprised of a single ultrasonic radiating element oriented toward the cavity emitting multiple waves.
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American Technology Corporation
Isen Forester W.
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