SPM: Analysing Sound Wave

Most of us love music, whether its rock, soul, jazz..joget, regardless of rhythm & genre.
But a few people appreciate the fundamentals behind those rhythm..which is the
… SOUND WAVE. …

In SPM u need to describe sound wave..( How ??)

a) sound is a longitudinal wave produced through vibrations in air.
b) Vibration of air molecules produce compression & rarefaction region
c) Sound needs medium (solid,gas, liguid) to travel, i.e it wont produce any
sound in vacuum like in outer space.. ( unlike starwars movie :) ..)
d) Sound travels fastest in solid..then liquid..and followed by air

Ok the diagram below helps u to understand sound wave better....



..next objective.. u'll also need to
1)Explain how the loudness relates to amplitude??

Answer:
- The loudness of sound is due to its amplitude.
- the higher the amplitude, the louder the sound

Ok..the amplitude of the sound wave is the amount of presssure applied on the air molecules.
- the more pressure applied/ the bigger the amplitude /thus the louder the sound.

Amplitude also related to ENERGY:
- the higher the amplitude,the louder the sound, the bigger the ENERGY


2) Relate pitch to frequency??

Answer:
- higher the pitch --> higher the FREQUENCY



In singing reality show, the juror always comment about their pitch..
so if the singer has "pitching lari" ..it means he/she does'nt produce enough frequency :)

To understand about pitching & loudness, better u visit this animation..but u need to key in
username:physics_form5
p/word:abcd1234