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Sound Energy

Sound Energy. Cian Taylor Email: cian.taylor@ireland.com Web: http://eduspaces.net/ciantaylor. Sound is a Form of Energy. A table tennis ball hung in front of a speaker Ball will move as the sound waves hit it. Table-tennis ball. Sound waves. Conversion of Sound Energy.

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Sound Energy

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  1. Sound Energy Cian Taylor Email: cian.taylor@ireland.com Web: http://eduspaces.net/ciantaylor

  2. Sound is a Form of Energy • A table tennis ball hung in front of a speaker • Ball will move as the sound waves hit it. Table-tennis ball Sound waves

  3. Conversion of Sound Energy • Sound causes our eardrums to vibrate. • This is an example of sound energy being converted from one form of energy to another, mechanical energy. Both forms are kinetic energy.

  4. Conversion of Sound Energy • Click on each box below to see how - sound energyis converted to kinetic energy - and to electrical energy

  5. Conversion of Sound Energy • Sound energy is converted into electrical energy in a telephone. • How? • The sound energy is converted to electrical energy by a microphone. Then into radiant energy when it is sent to the other phone.

  6. Conversion of Sound Energy • At the other end of the phone line • The radiant energy is converted backto electrical energy which is converted back into sound energy.

  7. Sound Transmission • Transmission means sending from one place to another. • Sound waves are transmitted by particles in the air. Animation courtesy of Dr. Dan Russell, Kettering University Air Molecules Ear Speaker

  8. Sound Transmission in Air • Sound waves in air are passed between molecule • What happens when you change frequency above?

  9. Sound does not Travel in a Vacuum Click on the graphic above to start the simulation. http://phet.colorado.edu/index.php

  10. The Speed of Sound • Sound travels at different speeds in different materials. • In air..........................340 m/s • In water.....................1500 m/s • In steel.......................6000 m/s

  11. The Speed of Sound • Which is faster, the speed of light or the speed of sound? • How do you know?

  12. The Speed of Sound • The speed of light is much faster! • The speed of light........... 300,000,000 m/s (approximately 186,282 miles per second ) • The speed of sound in air.... 340m/s • (0.21 miles per second)

  13. Light and Sound • Fireworks: - you see the firework explode before you hear the bang. • Waves on a beach: - you’ll see the waves break before you hear them breaking. • Lighting: - you see the lightning before you hear the thunder. http://en.wikipedia.org/wiki/File:Lightnings_sequence_2_animation.gif

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