Ultrasound is a form of energy generated by sound waves at
frequencies that are too high to be detected by the human ear.
These waves participate in a region of the sound spectrum that is
divided into three main parts: infrasound (v < 16 Hz), band sound
(16Hz < v < 16 kHz) and ultrasound (v > 16 kHz). The ultrasound
band is also divided into low frequency (16 kHz < v < 1 MHz) and