Changes

|[[File:SaxophoneSoprano.png|center|200px125px]]|[[File:SaxophoneAlto.png|center|200px125px]]|[[File:SaxophoneTenor.png|center|250px150px]]|[[File:SaxophoneBass.png|center|200px125px]]

| style="height:20px; width:200px125px; text-align:center;" |A small 'soprano' saxophone makes a high [[Pitch|pitched]] '''sound'''.| style="height:20px; width:200px125px; text-align:center;" |An 'alto' saxophone makes the second highest [[pitch]].| style="height:20px; width:200px150px; text-align:center;" |A tenor saxophone makes the second lowest [[pitch]].| style="height:20px; width:200px125px; text-align:center;" |A large 'bass' saxophone makes a low [[Pitch|pitched]] '''sound'''.

|[[File:Drumkit.png|center|300px200px]]|[[File:GuitarStrings.png|center|300px200px]]|[[File:Tuba.png|center|300px200px]]

| style="height:20px; width:300px200px; text-align:center;" |When you hit a drum hard, it makes a louder '''sound''' because the [[vibration]] is bigger.| style="height:20px; width:300px200px; text-align:center;" |When you pluck a guitar string harder, it makes a louder '''sound''' because the [[vibration]] is bigger.| style="height:20px; width:300px200px; text-align:center;" |Blow harder down a tube it makes a louder '''sound''' because the [[vibration]] is bigger.

[[Sound]] is a [[longitudinal]] [[wave]] of [[Compression Wave|compression]] and [[rarefaction]] that [[Energy Transfer|transfers energy]] and [[information]] through a [[medium]].

| style="height:20px; width:200px; text-align:center;" |This animation shows a [[speaker]] creating a [[sound]] by making a [[wave]] of [[Compression Wave|compression]] (dark grey) that passes through the [[air]].

: [[Volume (Sound)|Volume]] is determined by the [[amplitude]] of the [[wave]] the maximum [[displacement]] of the [[wave]] from its [[Equilibrium Position(Physics)|equilibrium position]].