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Monday, 17 June 2013

Refraction of Sound Waves

Updating you all once again, here is a post on the refraction of sound waves and how it relates to a dolphin's 'sight'! Also, a good news is that my professor, Dr.Tan has actually read my blog and found it interesting! I am so happy :D

Refraction occurs when sound waves travel through and medium and back.

http://m.eet.com/media/1064485/sound5_fig1.15.jpg
Sound wave through different media

This is due to the differences in the speed of sound. Sound waves bend when parts of the wave front travel at dissimilar speeds.
http://www.patana.ac.th/secondary/science/anrophysics/ntopic4/images/wavefront.gif
Picture of a Wave Front
By being able to sense ultrasonic(sound waves with frequencies above 20000 hertz) waves, dolphins can 'see' through the bodies of other animals and people.

Have you learnt new things?

Until next time!

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