What is difference between ultrasonic and infrasonic sound
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The key difference between infrasonic and ultrasonic waves is that infrasonic waves include sounds emitted at levels below frequencies of noise that can be heard by humans while ultrasonic waves are those that exceed 20 kilohertz, which is the upper limit of human noise perception.
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Infrasonic sound
The sound of frequency is lower than 20 hertz are known as infrasonic sound. It cannot be heard by humans.
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