Week 1c - ! ! Physics 1240 Thurs 1/13/11 Today: Periodic...

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Physics 1240 Thurs 1/13/11 To day : Periodic vibrations and pitch Next time : Waveforms and digital sound Last time: The physical nature of sound can be categorized into four basic processes: Generation (source), Propagation (waves), Reception/Perception (hearing), Processing (mainly digital electronics) Speed of sound: V = 344 + 0.6 (T-20 o ) m/s
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Outline - Periodicity and pitch - Simple harmonic motion - Frequency and pitch - Vibrations versus Waves
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Only a vibration that repeats itself at regular intervals produces the sensation of a distinct pitch pitch – the sensation of how high or low a steady tone sounds steady tone – a sound that is held steady that produces the sensation of a musical note
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Concept Question 1.5 Which object might exhibit periodic motion? A) a lump of clay B) a gong C) a guitar string on a guitar
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What object probably does not exhibit periodic motion? (assume the instrument plays only one note)
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Week 1c - ! ! Physics 1240 Thurs 1/13/11 Today: Periodic...

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