Rancho Palos Verdes, California - Meredith Perry and Nora Dweck two newly minted graduates from the University of Pennsylvania, were the only D9-tech conference this week showing off their demo persuasive technology: the transfer of power ultrasound.
uBeam, the society they have created around their technology uses sound waves beyond the range of human (and dog) hearing to transmit power. In a test of concept demonstration (see video), Perry has managed to get 5 volts at 50 milliamps, a quarter of a watt, more than three meters. She said it with custom components, not speakers piezo-the-shelf in the gross technical demo, it will be able to send 25 watts of ten meters.
I have spoken with engineers D9 were skeptical that science will evolve to the theory of power transfer. You can also create difficulties for health reasons, although Perry said the method of transmission is approved by OSHA and similar technology is used safely directed sound products. She also says that, unlike microwave, which can be used to transfer power, but is dangerous when absorbed by living tissues, uBeam ultrasound is reflected, not absorbed. But 25 watts is a lot of energy to pump into the air, and to be fair, Perry says he was inspired by reading uBeam how sound waves (of course, different frequencies) can be used as weapons.
