What is ultrasound ? What is the difference between ordinary sound and ultrasound ?
Ultrasound waves are high-frequency sound waves. Due to higher frequency, they can penetrate into matter to a large extent.
We can differentiate between ordinary and ultrasonic waves as :
|Audible sound waves||Ultrasound waves|
|They have a frequency range of 20 Hz–20,000 Hz||They have frequencies above 20,000 Hz|
|These sounds are audible to human ears.||These sounds are inaudible to human ears.|
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