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GENERATING SOUND FROM ULTRASOUND
GENERATING Conventional speakers require a balance between mechanical, acoustical and electrical resonances. As a speaker shrinks in size, keeping the resonance balanced is a complex challenge and the quality of sound is compromised.
We have developed a unique technology which, instead of attempting to solve the problem, actually turns it on its head. Our unique technology generates ultrasound from multiple speakers, each as wide as a strand of hair, and then transforms the ultrasound to sound using a patented acousto-mechanical frequency transformer.
The ultrasound speakers and frequency transformers are realized as a solid state MEMS device. The MEMS device is manufactured using semiconductor technologies leveraging the semiconductor eco system for scalability and price trajectory.
The outcome is clear: maximum sound quality in minimal size.
A small speaker generates ultrasound. The ultrasound propagates through a time varying acoustic channel which is an acoustic modulator. A large channel enables the ultrasound to pass and a small channel attenuates the ultrasound. The modulator shifts the ultrasound frequency to create sound
Sound from ultrasound speaker creates a volume velocity source. A standard speaker in earphone applications has a constant sound level for lower frequencies and drop short at higher frequencies (black line). A volume velocity source provides a constant volume velocity of air regardless of frequency and in earphone applications has increasing SPL for lower frequencies and extended SPL at high frequencies (green line).
WE’D BE HAPPY TO HEAR FROM YOU
WE’D BE HAPPY TO HEAR FROM YOU