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Sound Test - 8

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Sound Test - 8
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  • Question 1
    1 / -0

    On what factors does the loudness or intensity of sound depend?

    Solution

    The loudness or intensity of sound depends on its amplitude. The larger the amplitude, the louder is the sound produced.

  • Question 2
    1 / -0

    On what factors does the pitch of sound depend?

    Solution

    Pitch of sound depends on its frequency. 

  • Question 3
    1 / -0

    Which of the following produces sound in birds?

    Solution

    Birds produce sounds by means of a ring of cartilage called syrinx, present at the beginning of their wind pipe.

  • Question 4
    1 / -0

    Find the difference between a musical sound and noise.

    Solution

    Musical sound is produced by regular vibrations whereas noise is produced by irregular vibrations.

  • Question 5
    1 / -0

    Which of the following are the effects of noise pollution?

    (i) Insomnia

    (ii) Hypertension

    (iii) Hearing impairment

    Solution

    Noise pollution is hazardous to health in many ways. Insomnia (lack of sleep), hypertension (high blood pressure) and hearing impairment (temporary or permanent hearing problem) are the effects of noise pollution.

  • Question 6
    1 / -0

    Which of the following frequencies cannot be heard by human beings?

    Solution

    Human beings can hear only within the range of 20 Hz to 20 kHz. So, 100 kHz (1,00, 000 Hz) cannot be heard.

  • Question 7
    1 / -0

    Identify the three delicate bones in the middle ear.

    Solution

    The three delicate bones in the middle ear are the hammer, the anvil and the stirrup.

  • Question 8
    1 / -0

    Identify the nerve that carries the signals from the ear to the brain.

    Solution

    The nerve that carries the signals from the ear to the brain is called the auditory nerve.

  • Question 9
    1 / -0

    Which of the following helps human beings in producing sounds?

    Solution

    Vocal cords are a band of muscles within the larynx. These muscles vibrate to produce the sound.

  • Question 10
    1 / -0

    What is the number of vibrations made by a body in one second called?

    Solution

    Frequency is the number of vibrations that pass through a point in space in one second by a body.

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