looking at sound presented by. activity: dancing salt mathscience innovation center 2010
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Looking at SoundPresented by
Activity: Dancing Salt
MathScience Innovation Center 2010
Sound
• A form of energy produced and transmitted by vibrating matter.
– Vibration: back and forth movement of molecules
• It travels in waves.
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Waves
• Complete to and fro movement
• There and back
• Full cycle
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How many full cycles?
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3 cycles 3 waves
Wavelength
• the distance between one part of a wave and the same part of the next wave.
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Demonstration: Coil Spring
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Frequency
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• the number of waves moving past a point in one second.
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Which sound do you think has the higher frequency?
time
time
low
high
Pitch
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• the measure of how high or low a sound is.
• depends on the frequency of a sound wave.
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Which sound do you think has the higher pitch?
time
time
low
high
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Which sound do you think sounds louder?
time
time
soft
loud
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Activity:FREEZE!
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1.70.5542.86
3.1321.799
Making Music
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Notes:FGABflat
CDEF
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Higher Pitch
Shorter Pipe
G
Twinkle, Twinkle Little Star
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Fmelody
CC D
CC
D C
harmony A A BB A
F
Twin-kle,Twin-kle lit-tle star
Twinkle, Twinkle Little Star
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melody
G F
harmony
B B A A G
G FG F E E C
How I won-der what you are
Twinkle, Twinkle Little Star
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melody
CC
Gharmony
AABB
A A
G
FG F C
Up a-bove the world so high
Twinkle, Twinkle Little Star
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Fmelody
CC D
CC
D C
harmony A A BB A
F
Like a dia-mond in the sky.
Twinkle, Twinkle Little Star
MathScience Innovation Center 2010
melody
G F
harmony
B B A A G
G FG F E E C
Twin-kle,Twin-kle lit-tle star
Twinkle, Twinkle Little Star
MathScience Innovation Center 2010
melody
CC
Gharmony
AABB
A A
G
FG F C
How I won-der what you are.
Looking at our Song with the
Waveport
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Review:
Sound is caused by _________________ of matter
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vibrations
The faster the vibration, the higher the _________________________.frequency or
pitchThe bigger the vibration the __________ the sound. louder
Chladni Plate
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