Ultrasound is a high frequency sound wave. It is produced by a piezoelectric crystal inside a special transducer, which converts electrical energy into acoustic energy through the mechanical deformation of the piezoelectric effect.

The energy is transmitted inside the tissues, like a high parallel emission, with an uneven distribution of intensity in two ways: Continuous emission with mainly thermal effects, although at low intensity we also have mechanical, intermittent emission with mainly mechanical effects. When applied to biological tissue, it can cause significant changes in cells and tissues, causing temperature rise and micro-vibrations.

Inflammatory conditions of the joints (eg arthritis, bursitis, epicondylitis)