Sound
Sound
Decibel Ruler for understanding how loud sounds are:
http://www.tlc-direct.co.uk/Technical/Sounds/decible4.swf
Science of sound
http://www.ltscotland.org.uk/resources/s/sound/speedofsound.asp?strReferringChannel=resources&strReferringPageID=tcm:4-248286-64
Pitch and volume
http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/changing_sounds/play.shtml
Health & Safety Executive – noise induced hearing loss
