Ultrasonic wave


An elastic wave of a frequency above the audible range of human beings.

Application of ultrasonic waves as a means of supplying energy to micromachines from outside is under study for their little attenuation in water and in the living body. Sonic waves emitted from the source of sound propagate through the medium and vibrates the acoustic electromotive force device, which generates electric power. The output power is converted into direct current by rectifiers, and stored in a micro-battery, or directly fed to drive actuators.


[Related Terms]
Acoustic electromotive force element