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    science
    Grade6
    Easy

    Question

    Sound with 25000 HHz frequency is called _______.

    1. Ultrasound
    2. Infrasound
    3. Audible sound
    4. None

    Hint:

    Ultrasound ave frequencies 20,000Hz and above

    The correct answer is: Ultrasound

      • Sounds that have frequencies 20,000Hz and above are called Ultrasound.
      • It is sound waves with frequencies higher than the upper audible limit of human hearing.

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