State-of-the-Art Developments of Acoustic Energy Transfer

Table 2

Summary of the review.

AET type	Frequency; (min–max)	Active range; (max)	Efficiency %; (max)	Power level; (max)
Wall-through	24.5 kHz–13.56 MHz	1 m	88	1.068 kW
Implants	35 kHz–30 MHz	400 mm	45	5.4 W
Others	20.46 kHz–782 kHz	8.6 m	20	2 W