General Knowledge
NULL
Medium
Question
Ultrasonic waves are 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
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
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.
Explanation
more than 20 kilohertz.
Hence the keyed answer is more than 20 kilohertz.
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