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By: Iiro Sivula, Janne Järvinen & Hester Verwej


References:

 

ftp://cm.bell-labs.com/cm/amg/Physics_Com_wFig.pdf

http://astarmathsandphysics.com/o-level-physics-notes/o-level-physics-notes-the-telephone.html

 

http://www.connected-earth.com/Learningresources/Howitworks/Telephone/Howthetelephoneworks/index.htm

 

http://en.wikipedia.org/wiki/Telephone

http://electronics.howstuffworks.com/telephone.htm

http://en.wikipedia.org/wiki/Microphone

 

http://en.wikipedia.org/wiki/Sound

 

http://en.wikipedia.org/wiki/Telephone