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Waves Sound Questions
What is an Echo?
Sound that has been reflected is called an echo.
Sound
reflection best occurs from flat,
hard surfaces.
The natural
echo of a room is called
reverberation.
Reverberation is a measure of
how much the sound is
reflected around the room.
Materials that are soft and uneven
(like
curtains, carpets and cushions)
absorb sound
much more than they reflect it, and decrease
reverberation.
Reflected sound (as ultrasound) is
used for
range
and direction
finding, scanning
and cleaning.
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