General Knowledge
Medium
Question
Ultrasonic waves are those sound waves having frequency __________?
A
between 20 hertz and 1000 hertz
B
between 1000 hertz and 20000 hertz
C
less than 20 hertz
D
more than 20 kilohertz
✓ Official correct answer
Community credibility
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A
between 20 hertz and 1000 hertz
No member explanations yet for this option.
B
between 1000 hertz and 20000 hertz
No member explanations yet for this option.
C
less than 20 hertz
No member explanations yet for this option.
D
more than 20 kilohertz
No member explanations yet for this option.