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Sounds like a Turkey

Sounds like a Turkey. Happy Thanksgiving!!! -I am thankful for wonderful students . It’s all about vibrations!. When something vibrates (like our vocal cords) the particles in the air around it start moving. This movements is called “sound waves”

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Sounds like a Turkey

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  1. Sounds like a Turkey Happy Thanksgiving!!! -I am thankful for wonderful students 

  2. It’s all about vibrations! • When something vibrates (like our vocal cords) the particles in the air around it start moving • This movements is called “sound waves” • These waves travel through the air and hit your eardrum • Your eardrum then sends messages to your brain • Your brain interprets the “message” as sound

  3. What makes the different pitches • The wavelength of each sound wave determines the pitch

  4. Review: short versus long string Reminder: the quicker the vibration the higher the note, the slower the vibration the lower the note • Short = High • Long = Low http://pbskidsorg/designsquad/games/string_thing/msg_how_sound_works.swf

  5. Review: Thin versus thick string • Thin = High • Thick = Low http://pbskidsorg/designsquad/games/string_thing/msg_how_sound_works.swf

  6. Review: Less versus more tension • Less tension = High • More tension = Low http://pbskidsorg/designsquad/games/string_thing/msg_how_sound_works.swf

  7. Why do they look and sound so ridiculous? Brad Allen

  8. What’s with all the ornamentation? http://www.pbs.org/wnet/nature/episodes/my-life-as-a-turkey/wild-turkey-fact-sheet/7299/

  9. It’s all about getting a lady…

  10. Lets make a turkey call… Materials: • Paper cup • Pencil • String • Scissors • Paper clip • Water

  11. What’s happening? • As your fingers move down the string they cause friction • The friction causes vibrations • These vibrations travel up the string to the cup • The cup amplifies the vibrations, producing the sound you hear

  12. How do turkeys gobble?….she needs to hear you It happens in the syrinx (equivalent to the human vocal cords)

  13. How does it work? • The syrinx is a boxlike organ with elastic vibrating membranes • Similar to the rubber bands we played with • As air is exhaled from the lungs it crosses through the boxlike syrinx and is amplified • Similar to how sound was amplified inside our turkey call cup

  14. How do they make different sounds? • There are muscles attached to either side of the syrinx • These muscles are used to add tension to the membranes • Remember what happens when we changed the tension on the rubber band? • The pitch is altered • The turkey can make the sound louder or softer by increasing or decreasing the air flow through the syrinx

  15. Lets hear how it really sounds • http://www.youtube.com/watch?v=5gHhHH7pwYE

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