looking at sound presented by. activity: dancing salt mathscience innovation center 2010

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.


Waves

• Complete to and fro movement

• There and back

• Full cycle


How many full cycles?


3 cycles 3 waves

Wavelength

• the distance between one part of a wave and the same part of the next wave.


Demonstration: Coil Spring


Frequency


• the number of waves moving past a point in one second.


Which sound do you think has the higher frequency?

time

time

low

high

Pitch


• the measure of how high or low a sound is.

• depends on the frequency of a sound wave.


Which sound do you think has the higher pitch?

time

time

low

high


Which sound do you think sounds louder?

time

time

soft

loud


Activity:FREEZE!


1.70.5542.86

3.1321.799

Making Music


Notes:FGABflat

CDEF


Higher Pitch

Shorter Pipe

G

Twinkle, Twinkle Little Star


Fmelody

CC D

CC

D C

harmony A A BB A

F

Twin-kle,Twin-kle lit-tle star



melody

G F

harmony

B B A A G

G FG F E E C

How I won-der what you are



melody

CC

Gharmony

AABB

A A

G

FG F C

Up a-bove the world so high



Fmelody

CC D

CC

D C

harmony A A BB A

F

Like a dia-mond in the sky.



melody

G F

harmony

B B A A G

G FG F E E C

Twin-kle,Twin-kle lit-tle star



melody

CC

Gharmony

AABB

A A

G

FG F C

How I won-der what you are.

Looking at our Song with the

Waveport


Review:

Sound is caused by _________________ of matter


vibrations

The faster the vibration, the higher the _________________________.frequency or

pitchThe bigger the vibration the __________ the sound. louder

Chladni Plate


looking at sound presented by. activity: dancing salt mathscience innovation center 2010

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