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Sound waves with a frequency above 20,000 Hz are referred to as infrasonic waves ultrasonic waves sonic booms doppler waves
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Sound waves with a frequency above 20,000 Hz are referred to as

infrasonic waves
ultrasonic waves
sonic booms
doppler waves

User Simon Holroyd
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7.3k points

2 Answers

3 votes

Answer: The answer is ultrasonic waves.

Explanation: they use these waves for big machines because they have a powerful charge.

User Caramba
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8.2k points
7 votes
Ultrasonic waves is the answer
User William Seemann
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7.9k points
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