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## Physics / Propagation of Sound Waves

### Physics / Propagation of Sound Waves

The world around us is full of different sounds. They range from pleasant bird calls to the uncomfortable noise of machines. We do not see sound, but we can hear it when it reaches our ears. Sound is a form of energy that produces the sensation of hearing in our ears.
Sound comes from vibrations. These vibrations create sound waves which move through mediums such as air and water before reaching our ears. Sound propagation requires a material medium. Understand how sound waves propagate in the form of compression and rarefaction and how your ears give you the ability to hear them.
The speed of sound is different in different media given by V = \sqrt{\frac{E}{d}}, where E = modulus of elasticity = density of medium.
Speed of sound is fastest in solids, moderate in liquids and slowest in gases.
Understand the various factors affecting the speed of sound in a gas.
Wavelength - The speed of sound does not depend on wavelength of sound wave, Effect of Density - V = \frac{1}{\sqrt{d}}. The speed of sound is inversely proportional to the square root of density of the gas.
Pressure - The speed of sound is independent of the pressure.
Temperature - The speed of sound increases with the increase in temperature of the gas.
Learn more than this how sound is effected by humidity and wind .Find out why the spectators watching the cricket game hear the sound a little later than the batsman actually drives a stroke.

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Exercises
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• ### Propagation of Sound Waves - SmartTest

A SmartTest on Propagation of Sound Waves

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• Average Time: 00:04:57
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• Questions: 18
• Introduction to propagation of Sound Waves
• Production of sound
• Propagation of sound
• Terms related to wave motion
• Speed of sound in different media
• Range of hearing and ultrasound
• Propagation of sound waves review
• ### Propagation of Sound Waves -- Summary

Learnhive Lesson on Propagation of Sound Waves

• Accessed by: 292 Students