Effects of Sound Waves (Cambridge (CIE) IGCSE Co-ordinated Sciences (Double Award)) : Revision Note
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Pitch & loudness
Changes in amplitude and frequency affect the loudness and pitch of sound waves
The frequency of a sound wave is related to its pitch
Sounds with a high pitch have a high frequency (or short wavelength)
Sounds with a low pitch have a low frequency (or long wavelength)
The amplitude of a sound wave is related to its volume
Sounds with a large amplitude have a high volume
Sounds with a small amplitude have a low volume

Pitch and amplitude of sound
Echoes
Sound waves reflect off hard surfaces
The reflection of a sound wave is called an echo
An example of an echo

A clap sound is reflected off a wall. When the reflected sound is heard this is the echo
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