SOUND
What do you hear?
What do you hear?
DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?
WAVES
Transversal Waves
Crest
Longitudinal Waves
AMPLITUDE – Height of the waveThe higher the amplitude, the louder the sound
Frequency – Number of waves per second.High frequency, higher the pitch
SOUND WAVES
Must travel in a MEDIUM.
SPEED OF SOUND
SOUND TO THE EAR
How a trumpet works!
http://www.youtube.com/watch?v=olA3TrgnK7o&safety_mode=true&persist_safety_mode=1&safe=active
How a drum works!
http://www.youtube.com/watch?v=jR17iCbMMOA&safety_mode=true&persist_safety_mode=1&safe=active
How an electric guitar works!
http://www.youtube.com/watch?v=lBAZepM5F_0&safety_mode=true&persist_safety_mode=1&safe=active
How a cell phone works!
http://www.youtube.com/watch?v=xv9dRENgDoc&safety_mode=true&persist_safety_mode=1&safe=active
REVIEW
SOUND TRAVELS IN ___________
The higher the amplitude, the _________ the sound
The higher the frequency, the __________ the pitch
REVIEW
In what medium does sound travel fastest?
Solid, liquid or gas
Sound is usually measured in _________. Humans hear from _____ to ______ Htz
Label the parts of the waves
What did you learn today?
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