The lower the frequency the deeper the action of the mechanical vibrations; this is why the very low frequency vibrations (between 0 and 20 Hz) have a deep and targeted action. .

These vibrations mainly affect the hypodermis and the deep dermis. However they also affect the epidermis and the superficial dermis which they need to traverse in order to reach the deep layers.

Cutaneous penetration of active vibrations between 10 and 60 Hz