The basic structure of the ultrasound power supply and communication. (© Photo Fraunhofer IBMT)

Scientists have developed a demonstrator that powers active implants wirelessly via ultrasound. Ultrasound waves have a broader range in the body, and they penetrate the implant’s metal casing more easily than electromagnetic waves. The ultrasound waves are also capable of bidirectional transfer of information, such as the temperature of the implant, or details regarding the type and intensity of electrical stimulation.

The research team developed a complete system that includes the transmitter outside the body and the receiver in the implant. The demonstrator also falls well below stipulated regulatory limits for ultrasound treatments on the human body.