This has been brought up before in previous discussions.
My understanding is they are using MEMs devices to construct a mini analog speaker.
A piezo electric device takes an analog electric signal and converts into a physical movement, just like a voice coil/magnet on a typical speaker.
Audiopixels is using digital sound reconstruction from an array of MEMs pistons. The pixels (pistons) are digital (i.e. on/off). They don't vary in amplitude in response to an input signal.
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This has been brought up before in previous discussions. My...
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