Introduction:
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 ultrasound.
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.
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