Learning Objectives
--describe the production of sound by vibrating sources
--describe the longitudinal nature of sound waves and describe compression and rarefaction and deduce that
(i) a medium is required in order to transmit these waves
(ii) the speed of sound differs in air, liquids and solids
--describe a direct method for the determination of the speed of sound in air and make necessary calculation
--explain how the loudness and pitch of sound waves to amplitude and frequency
--explain why different instruments produce sounds of different quality
--describe how the reflection of sound may produce an echo, and how this may be used for measuring distances
-- define ultrasound and describe one use of ultrasound, e.g. cleaning, quality control and pre-natal scanning
--* describe and explain the Doppler effect
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This topic will be tested in Term 1 test 1 2012
Visualise sound!


Watch the following videos on sound.




Read more about sound from the following websites.
Nature of Sound Wave
http://vle.hci.edu.sg/physics/GCSE%20Absorb%20Physics/units/DJFPh082.html
http://vle.hci.edu.sg/physics/WebTeach/Sound/Sound/Sound%2002-nature.htm
Sound is a Mechanical Wave
http://www.physicsclassroom.com/class/sound/u11l1a.cfm
Sound as a Longitudinal Wave
http://www.physicsclassroom.com/class/sound/U11L1b.cfm
Sound as a Pressure Wave
http://www.physicsclassroom.com/class/sound/U11L1c.cfm

Properties of sound

Pitch and frequency
http://www.physicsclassroom.com/class/sound/u11l2a.cfm
Intensity and the Decibel Scale

http://www.physicsclassroom.com/class/sound/U11L2b.cfm
The Speed of sound

http://www.physicsclassroom.com/class/sound/U11L2c.cfm
http://vle.hci.edu.sg/physics/GCSE%20Absorb%20Physics/units/DJFPh083.html
The Human Ear

http://www.physicsclassroom.com/class/sound/U11L2d.cfm

Behaviour of Sound
Interference and beats

http://vle.hci.edu.sg/physics/GCSE%20Absorb%20Physics/units/DJFPh085.html
http://www.physicsclassroom.com/class/sound/u11l3a.cfm
The Doppler Effect and Shock Waves

http://vle.hci.edu.sg/physics/WebTeach/Sound/Sound/Sound%2013-doppler%20effect.htm
http://www.physicsclassroom.com/class/sound/U11L3b.cfm
Reflection, Refraction, and Diffraction
http://www.physicsclassroom.com/class/sound/U11L3d.cfm

Resonance
Natural Frequency http://www.physicsclassroom.com/class/sound/u11l4a.cfm


Ultrasound and infrasound
http://vle.hci.edu.sg/physics/GCSE%20Absorb%20Physics/units/DJFPh086.html
http://vle.hci.edu.sg/physics/WebTeach/Sound/Sound/Sound%2012-infra%20and%20ultra.htm


yTeach resources on Sound (New)
**www.ylearn.co.uk**

Introduction to sound (access code : Sec3Sound1)
Ultrasound and Infrasound (access code : Sec3Sound2)
Sound in Music (access code : Sec3Sound3)
Sound intensity (access code : Sec3Sound4)
Interferences of sound (access code : Interferenceofsound)
The Doppler Effect (access code : Dopplereffect)


Sound Quiz