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S ound Energy

S ound Energy. J agger , D r e w F renc h , and D re w Annett. How does sound move?. The speed of sound is about 330 meters per second. Sound waves require some kind of material to travel through. Sound waves can not move through a vacuum. Sound moves through the air at 340m per second.

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S ound Energy

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  1. SoundEnergy Jagger, DrewFrench, and DrewAnnett

  2. How does sound move? • The speed of sound is about 330 meters per second. • Sound waves require some kind of material to travel through. • Sound waves can not move through a vacuum. • Sound moves through the air at 340m per second. • Hard materials can reflect sound so that the sound travels back in the opposite direction, this is called an echo. • The faster the vibrations are the higher sound goes, and the slower they go the lower the sound

  3. What is sound made of? • Sound energy is the energy produced by sound vibrations as they travel through a specific medium. • Sound energy is, therefore, a form of mechanical energy. • Sound is measured in joules. • Puckering, blowing, shaking, beating or scraping can make sounds. • Sound is sent out through gases, and liquids as longitudinal waves, also called compression waves.

  4. How is it useful? • Sound is used to locate fish, find submarines, and measure temperature in the ocean. • Bats and dolphins use echolocation which is when sound bounces off an object and back to the animal. • Submarines don't have telephone or cable connections, radio signals don't spread underwater, so a submarines relies on sound to send and receive digital data. •  Sound gives us music. • Powerful instruments can have an emotional effect on someone. •  Sound recordings let us listen to all kinds of music.

  5. What’s bad about sound?? • Sound can cause stress and pain. • Dogs can perceive vibrations higher than 20 kHz. • For humans hearing is normally limited to frequencies between about 20 Hz and 20,000 Hz.

  6. Bibliography • www.wisegreek.com • www.wikipedia.org • www.prisci.gold.ac.uk/hearingwhispers/facts.htm • www.dosits.org • www.thinkquest.org • Our Science Notebook!! The End

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