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Welcome to PHYS/MUS 102, Spring 2014

Welcome to PHYS/MUS 102, Spring 2014. Today’s Schedule. 9-10:15( ish ) Syllabus + Intro Stuff Lecture: Simple Harmonic Motion 10:15( ish ) – 10:30 Quick stretch/restroom break. 10:30-11:00 Intro to Lab Equip (meet in Howe 204). 11am-2 pm

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Welcome to PHYS/MUS 102, Spring 2014

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  1. Welcome to PHYS/MUS 102, Spring 2014

  2. Today’s Schedule 9-10:15(ish) Syllabus + Intro Stuff Lecture: Simple Harmonic Motion 10:15(ish) – 10:30 Quick stretch/restroom break. 10:30-11:00 Intro to Lab Equip (meet in Howe 204). 11am-2 pm Do experiment (take lunch whenever you wish) 2-3 pm Help with lab reports (optional)

  3. Introductions • Name • Hometown • Major and class year • Music background • What’s on your playlist at the moment • One fun/random fact

  4. Quotable Quotes Life without playing music is inconceivable for me. -Albert Einstein Image credit: http://www.stumbleupon.com/stumbler/MamaJS/reviews/

  5. Quotable Quotes To stop the flow of music would be like the stopping of time itself, incredible and inconceivable. -Aaron Copland

  6. Questions to ponder: • What is music? • How would you define it in physical terms?

  7. Harmonic Analysis It’s all in your head: psycho-acoustics Pure listening pleasure: Auditorium design Sound waves/vibrations

  8. Ferris Wheel Problem You and a friend are riding the Ferris wheel. How would you plot your height above the ground vs time as the ferris wheel turns? The wheel has a radius of 20m, and you complete one trip around the wheel every two minutes. Height (m) Time (min) 1 2 5 3 4

  9. Oscillations/Simple Harmonic Motion time Period

  10. Simple Harmonic Motion: Basic Definitions A = amplitude T = period f = 1/T = frequency x(t) = displacement/position as a function of time x(t)

  11. Diving Board Oscillations Analogy of diving board in musical setting = ?

  12. Transient Decay Musical note “dies out” Zoomed in (17 msec) t Decay time: where amplitude of signal drops to e-1of the max amplitude = ~37% of max amplitude

  13. Answer: Everything What’s all this got to do with music?!

  14. Lab Reports • Introduction: what you are studying and why • Methods: what you did and how it works-- theory and techniques described in detail • Results: what you observed • Discussion: what it all means

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