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HEARING

HEARING. MUSICAL ACOUSTICS. Science of Sound Chapter 5. MUSICAL ACOUSTICS. RANGE OF HEARING. OUTER, MIDDLE, AND INNER EAR. THE COCHLEA. THE EAR. MIDDLE EAR: THE OSSICLES. RESPONSE OF THE BASILAR MEMBRANE TO A PAIR OF TONES.

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HEARING

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  1. HEARING MUSICAL ACOUSTICS Science of Sound Chapter 5

  2. MUSICAL ACOUSTICS

  3. RANGE OF HEARING

  4. OUTER, MIDDLE, AND INNER EAR

  5. THE COCHLEA

  6. THE EAR MIDDLE EAR: THE OSSICLES

  7. RESPONSE OF THE BASILAR MEMBRANE TO A PAIR OF TONES AS THE INTERVAL DECREASES THEIR RESPONSE CURVES SHOW INCREASING OVERLAP

  8. CRITICAL BANDWIDTH CONSTANT AT LOW FREQUENCY BUT PROPORTIONAL TO f AT HIGH FREQUENCY

  9. EAR FUNCTION

  10. SOUND SOURCE LOCALIZATION

  11. PRECEDENCE EFFECT • (Also called “Haas effect” or “Law of the first wave front”) • THE SOURCE IS PERCEIVED TO BE IN THE • DIRECTION FROM WHICH THE FIRST SOUND • ARRIVES, PROVIDED THAT: • Successive sounds arrive within ~ 35 ms; • Successive sounds have spectra and time envelopes • similar to the first sound; • 3. Successive sounds are not too much louder than the • first sound.

  12. LINEAR LOGARITHMIC

  13. LOGARITHMS AND POWERS OF TEN

  14. PRACTICE PROBLEMS (no calculator, please) 2.1x102 +1.4x10-2 = 3.0x108/300 = log 8 = log 2x107 = log ½ = log 1/5 = log 200 = log 400 = log 500 =

  15. SOLUTIONS TO PRACTICE PROBLEMS 2.1x102 +1.4x10-2 = 210 + 0.014 = 210.014 3.0x108/300 = 106 log 8 = log 23 = 3 log 2 = 0.903 log 2x107 = log 2 + log 107 = 7.301 log ½ = -log 2 = -0.301 log 1/5 = log 2/10 = 0.301-1 = -0.699 log 200 = log 2 + log 100 = 2.301 log 400 = log 2 + log 2 + log 100 = 2602 log 500 = log 1000 – log 2 = 3 – 0.301 = 2.699

  16. DEPENDENCE OFSUBJECTIVE QUALITIES OF SOUND ON PHYSICAL PARAMETERS

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