resonance science of music. remember the spring the result was oscillatory motion amplitude time
TRANSCRIPT
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Resonance
Science of Music
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Remember the Spring
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The Result was OSCILLATORY MOTION
Am
plitu
de Time
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Sprung
m
kf
2
1
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Friction
Same Frequency
Envelope Curve
Energy Loss
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Springto Swing
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Video – Bowling Ball
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VideoDriving the Spring
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Resonance is a GENERAL phenomenon
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Solid Objects
All have their own modes of vibration. Each has its own resonant frequency. Musical Examples
Cymbals – (very melodic!) Drum Bell Guitar &similar stringed instruments.
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To remember -
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Meet Ough
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Where are we going?
Vibration
platesand
At RESONANCE, this thing makes a lot of noise.Else, not.
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Other Frequencies
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Video on Plates
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Back to the old guitar …
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Little String … BIG force
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BIG Vibrations
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Response vs Frequency
Frequency
Are
a of
pla
te m
ovin
g
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What’s Happening?? It’s all about energy.
String vibrates Gradually loses energy
The plates begin to vibrate and produce a strong sound which is what we hear.
The plates are vibrating in many modes at the same time.
As the string loses energy, it stops supplying energy to the plates.
The sound from the plates decrease with time as they run out of energy. Each mode has a different rate of energy loss.
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Performer has some control.
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Resonances of a guitar
point.