Patent ID: 6606389
Filing Date: 2003-08-12
Classification: G10K,H04R

Abstract:
A system for indirectly generating at least one new sonic or subsonic frequency from at least two ultrasonic frequencies of different value, said system comprising:an emitter plate having an outer face and an inner face, said plate including a plurality of apertures; a piezoelectric membrane including an array of arcuate emitter faces disposed on the emitter plate, said array of arcuate emitter faces being positioned over the plurality of apertures; and electrical input means coupled to the membrane for developing a vibration response at the plurality of apertures and associated arcuate emitter configurations, wherein the vibrations operate as an ultrasonic frequency emitter for concurrently propagating (i) a first ultrasonic frequency and (ii) a second ultrasonic frequency which interacts with the first ultrasonic frequency within a compressible transmission medium to propagate a difference frequency within a sonic bandwidth.