SOUND

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SOUND
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What do you hear?
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What do you hear?

• DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?

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WAVES
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Transversal Waves
Crest
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Longitudinal Waves
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AMPLITUDE Height of the waveThe higher the
amplitude, the louder the sound
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Frequency Number of waves per second.High
frequency, higher the pitch
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SOUND WAVES
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Must travel in a MEDIUM.
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SPEED OF SOUND
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SOUND TO THE EAR
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How a trumpet works!

• http//www.youtube.com/watch?volA3TrgnK7osafety_
  modetruepersist_safety_mode1safeactive

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How a drum works!

• http//www.youtube.com/watch?vjR17iCbMMOAsafety_
  modetruepersist_safety_mode1safeactive

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How an electric guitar works!

• http//www.youtube.com/watch?vlBAZepM5F_0safety_
  modetruepersist_safety_mode1safeactive

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How a cell phone works!

• http//www.youtube.com/watch?vxv9dRENgDocsafety_
  modetruepersist_safety_mode1safeactive

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REVIEW

• SOUND TRAVELS IN ___________
• The higher the amplitude, the _________ the sound
• The higher the frequency, the __________ the pitch

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REVIEW

• In what medium does sound travel fastest?
• Solid, liquid or gas
• Sound is usually measured in _________.
• Humans hear from _____ to ______ Htz

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Label the parts of the waves
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What did you learn today?