our ultrasound probes are not hot and the vibrations cannot be felt when one puts their skin against the surface?” The answer is simple; ultrasound waves do
NOT generate heat or induce thermal changes at the surface (neither the skin nor the probes). The principle behind Ultrasound Therapy is that ultrasound waves penetrate the skin to warm the area underneath it to achieve its purpose (the depth of penetration is dependent on the intensity level of the probe).
