How to Reflect Sound
You will need:
scissors, gummed cellophane tape, broomstick, and watch, cardboard.
Sound waves can be
reflected in much the same way that light rays are reflected by a mirror. Make
two paper tubes by rolling newspaper around a broom handle. Tape each tube
We do not need a mirror to
reflect sound waves. Instead, a sheet of strong cardboard or hardboard will
serve to 'bounce' them.
The ticking of a watch or
clock makes a good sound to experiment with. Hold a watch at one end of a paper
tube as you direct it toward the cardboard. Have your partner cover one ear so
that she can hear the ticking through the second paper tube, directed toward
the sounding board.
Experiment with different
positions of the tubes and you will soon appreciate how readily sound waves can