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    Question

    Which one of the following animals can hear ultrasonic

    sound?
    A Rat Correct Answer Incorrect Answer
    B Squirrel Correct Answer Incorrect Answer
    C Cat Correct Answer Incorrect Answer
    D Bat Correct Answer Incorrect Answer

    Solution

    Ultrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.

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