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Early experiments with MEMS technology yielded speakers that could not deliver the full range of audio, and had particularly problems adding bass. Others have tried to solve these problems with MEMS/voice coil hybrid speakers, a solution that doesn’t permit for the tiny size that may be the greatest promise of the new tech. In 2nd Gen MEMS a small speaker generates ultrasound. The ultrasound propagates through a time varying acoustic channel that acts as 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.
Conventional speakers require a balance between mechanical, acoustical and electrical resonances. As a speaker shrinks in size, keeping the resonance balanced becomes a more complex challenge and the quality of sound is compromised.
We have developed a unique technology that, instead of attempting to solve the problem, actually turns it on its head. Our unique technology generates ultrasound from multiple speakers, each no wider as a strand of a hair, and then transforms the ultrasound to audible sound using a patented acousto-mechanical frequency transformer.
(Henrik 1102)
A standard speaker in earphone applications has a constant sound level for lower frequencies and drops 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).
No vibrations mean full freedom of positioning the SonicEdge 2nd Gen Mems speaker close to a microphone or wherever it fits best in your design. It operates at ultrasound frequencies and therefore emits no vibration that could disturb other components. Without vibrations the SonicEdge speaker can be mounted without any suspension or dampening.
HQ and MEMS development
HaMelachaSt 4
Binyamina-Giv’at Ada
Israel
ASIC development
DTU Science Park
2800 Kongens Lyngby
Denmark
CVR: 43 12 08 32