Waffle@infosec.pub 1 week ago
This is possible, but via a slightly different mechanism. Using piezoelectric sensors that effectively vibrate to harvest energy.
medicaldesignbriefs.com/…/51048-improved-ultrasou…
My brother worked for a large Korean tech company that was evaluating similar technology for consumer grade application (think whole room wireless charging… Another aspect they were looking into was using low frequency sound waves to emulate the sensation of a physical button so that washer/dryers could have virtual knobs that feel analog.
Likely not something scalable at this point, but in theory it is possible.