Ultra sonic waves have many
industrial and medical applications. They are known to be safe for
human and we can not hear them. Some animals such as mouse , cat
and dog who can hear higher frequencies than human can hear
Ultra sound is used as a
repellent for rodents, is used to measure distances, view inside
human body, melt fat in liposuction, skin treatment and many more.
Ultrasound may also have some
effect on bacteria growth.