Sound by Xavier Chan

Sound

Loudness

depends on amplitude

Pitch

depends on Frequency

consists of audible frequencies from 20 Hz to 2okHz

e.g.echoes

if above 20 kHz

if below 20Hz

New node

frequencies produced by vibrations

propagated by longitudinal waves

Speed

v=d÷t

Echo

v=2d÷t

reflected sounds that cannot be heard as separate sounds after an interval of silence

the higher the frequency of a sound, the higher its pitch

the greater the amplitude,the louder the sound