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1.3 Ups and Downs - 1.3TheUpsandDowns ScienceofMusic 1...

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1 Science of Music 1.3 The Ups and Downs
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2 Things that go back and forth Pendulum Mass on Spring
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3 Another Graph .. a biggy! -1.5 -1 -0.5 0 0.5 1 1.5 0 5 10 15 20 25 Time (seconds) disturbance               Height                  
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4 Important Definitions T f or period frequency 1 1 = = The PERIOD, T is the time it takes to go from one condition to the next time that exact condition is repeated. The frequency , the number of oscillations per second, is given by: Example: If T=2 seconds F=1/2 (sec -1 )=0.5 per second
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5 Question What is a tone and how  do you prove it??
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6 Hemholtz In  physiology  and  physiological psychology , he is known for his mathematics of the  eye theories of  vision ideas on the visual  perception  of space,  color vision  research,  the sensation of tone,  perception of sound.  In  physics , he is known for his theories on the  conservation of  force work in  electrodynamics chemical thermodynamics mechanical  foundation of  thermodynamics 1821 - 1894
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7 Siren … a scientific instrument
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8 The Graph -0.2 0 0.2 0.4 0.6 0.8 1 1.2 0 2 4 6 8 10 12 Time in milli-seconds "airspeed" - relative
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9 100 Bottles of beer on the wall …
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10 Resonance (later) Rotational Speed (Turns/second) Loudness
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11 Helmholtz Resonators
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12
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13 Helmholtz’s Results Note from Middle C Frequency C 264 D 297 E 330 F 352 G 396 A 440 B 496
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