your partner to stand half the distance across the room from you
and whisper a sentence to you.
up a balloon and tie the end. The air in the balloon is squeezed
or compacted. Hold the balloon against your ear. Ask your partner
to whisper a sentence to you again.
places and repeat the experiment.
the balloon change the sound of your partner's whisper? How and
air or compacted air transmit sound better?
air in the balloon is under greater pressure than the surrounding
air. Since the air in the balloon is denser than the surrounding
air, sound travels better through the balloon.