Patent ID: 6359990
Filing Date: 2002-03-19
Classification: F41H,G10K,H04R

Abstract:
A sound emitting device for providing at least one new sonic frequency as a by-product of emitting at least two ultrasonic frequencies from an ultrasonic frequency emitter, said device comprised of:an audio emitting perimeter positioned around a central open section, said open section having a diagonal width greater than a cross-sectional diagonal of the emitting perimeter of the support base, said audio emitting perimeter, said audio emitting perimeter having a directional orientation along a transmission axis; an ultrasonic frequency signal source for generating a first ultrasonic signal; a sonic or subsonic frequency generator for supplying an electrical signal corresponding to the at least one new sonic or subsonic frequency; modulating means coupled to the ultrasonic frequency signal source and sonic or subsonic frequency generator for mixing the first ultrasonic frequency signal with the electrical signal corresponding to the at least one new sonic frequency to thereby generate a waveform including the first ultrasonic frequency signal and a second ultrasonic frequency signal; said emitting perimeter comprising ultrasonic frequency emitting material coupled to an output of the modulating means for (i) propagating a waveform embodying both the first and second ultrasonic frequency signals, and (ii) generating the at least one new sonic frequency as a by-product of interaction between the first and second ultrasonic frequency signals.