To those who are interested in reading more of this tech: uBeam's patent: https://www.google.com/patents/US20120299540 https://www.google.com/patents/US2012029

To those who are interested in reading more of this tech: uBeam's patent: https://www.google.com/patents/US20120299540 https://www.google.com/patents/US20120299540 "Because decibels are a logarithmic scale, a decrease of 3dB is half the power. With the uBeam system, being just one meter away from the transmitter will bring the power down by half... It’s also absolutely insane. For something that claims to be as easy as WiFi to install, look at the differences: WiFi merely requires a single router to be installed anywhere in the store. uBeam would require a dozen transmitters, each of with include mechanical steering for their transducers. uBeam would require everyone to buy an ultrasonic power receiver for each device."[0] [0]http://hackaday.com/2015/10/20/the-curious-case-of-ultrasonic-power-transfer/ http://hackaday.com/2015/10/20/the-curious-case-of-ultrasoni...