Week 8b - Physics 1240 Today Musical Notes and Intervals...

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Physics 1240 Thurs 3/3/2011 Today: Musical Notes and Intervals Next time: Musical intervals and scales Outline - Virtual Pitch - Pythagorean hypthesis on musical intervals - Frequencies of musical notes - The keyboard and musical notes - Musical intervals
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Last time Outer ear : pinna, auditory canal Middle ear : Ear drum, ossicles: Hammer (malleus), anvil (incus), stirrup (stapes) Inner ear : cochlea, oval window, circular window, basilar membrane, hair cells, auditory nerve The cochlea is a “mechanical spectrum analyzer.”
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Virtual Pitch The ear fills in the “missing” fundamental (this is purely due to hearing perception) Example Suppose you heard the combination of pure tones at 200, 300, 400 Hz. You would perceive a pitch with a fundamental at 100 Hz. Demo IPO Tracks 37, 43-45
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The ear fills in the “missing” fundamental Harmonic series: f, 2f, 3f, 4f, 5f, … Strategies 1) determine the largest common factor (always works) 2) try subtracting two nearby harmonics (may get you the answer quickly, but check)
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Week 8b - Physics 1240 Today Musical Notes and Intervals...

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