sound. what do you hear? did you ever wonder how you hear these things?
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DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?TRANSCRIPT
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?