Question : The frequency of ultrasound waves is typically:
Option 1: above 20 kHz
Option 2: above 20,000 kHz
Option 3: below 20 kHz
Option 4: below 2 kHz
Correct Answer: above 20 kHz
Solution : The correct option is above 20 kHz .
The number of full cycles or oscillations that an ultrasonic wave undergoes in one second is referred to as its frequency. The most common unit of measurement is the hertz (Hz), where one hertz equals one cycle every second. Ultrasound waves have frequencies that are higher than the human ear's hearing range, which is commonly thought to be between 20 Hz and 20,000 Hz.
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