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9th Class Science Sound Question Bank Sound Summative Objective Problems

  • question_answer
    The hearing ranges of some animals are shown in the given bar graph.
    Which of the given animals has the ability to hear sounds with the highest pitch?

    A)  Grasshopper    

    B)  Human

    C)  Bat          

    D)  Cat

    Correct Answer: C

    Solution :

      Pitch of a sound depends on the frequency of vibration of an object. Pitch of a sound is higher for larger frequencies. It is clear from the given bar graph that a bat can hear a sound with the maximum frequency of 200 000 Hz which is higher than the maximum audible frequencies for a grasshopper (2 000 Hz), a human (20 000 Hz), and a cat (70 000 Hz). Hence, among the given animals, a bat can hear sounds with the highest pitch. The correct answer is C.                               


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