Noise

This task is about echoes and sound insulation.

Question

a)  During a class tramp a teacher called out to a group of children.
     Her shout produced an echo.
     For her voice to echo, where would the teacher most probably have been standing?

    • Amongst large trees

    • Facing a tall cliff

    • On a hill top

    • In a clearing in the bush.

Question 1Change answer

b)  Describe what happens to the sound when you hear an echo.

Question

c)  Which of the following would most help in reducing the noise level in a room?

    • A bare wooden floor and no window coverings.

    • A carpeted floor and curtains on the windows.

    • A tile floor and metal blinds on the windows.

    • A concrete floor and wooden shutters on the windows.

Question 1Change answer

d)  Why are some materials better at keeping noise levels down than others?
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