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    Question

    What do we call sound waves with frequencies below 20

    Hz?
    A Audio Sounds Correct Answer Incorrect Answer
    B Infrasonic Correct Answer Incorrect Answer
    C Ultrasonic Correct Answer Incorrect Answer
    D Supersonic Correct Answer Incorrect Answer

    Solution

    Infrasonic waves are sound waves with frequencies below the range of human hearing, typically below 20 Hz.

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