looking at sound

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

Documents

high twinkle

sound travels

tle star twinkle

effects of silent sound

number of waves

higher frequency

frequency of different

movement of molecules