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CHAPTER 12

CHAPTER 12. Loudness and Pitch. Loudness/Pitch. Loudness--psychological experience most directly related to sound pressure/intensity Pitch--psychological experience most directly related to frequency. Loudness/Pitch. Measuring Loudness:.

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CHAPTER 12

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  1. CHAPTER 12 Loudness and Pitch

  2. Loudness/Pitch • Loudness--psychological experience most directly related to sound pressure/intensity • Pitch--psychological experience most directly related to frequency Loudness/Pitch

  3. Measuring Loudness: • Matching Procedure: listeners match loudness of tones at various frequencies to 1000 Hz tone -- yields unit of loudness called the PHON Loudness/Pitch

  4. Equal Loudness Contours: The Phon Lines Loudness/Pitch

  5. Measuring Loudness: • Estimation or Scaling Procedure: listeners rate tones for loudness -- yields unit called the SONE • 1 sone = loudness of a sound with a loudness level of 40 phons. • 2 sones are twice as loud as 1 sone. • Loudness in Sones Doubles Every 10 dB Loudness/Pitch

  6. PITCH: • Place Code • Periodicity Pitch • Missing Fundamental Phenomenon Loudness/Pitch

  7. Loudness/Pitch

  8. PITCH UNITS • mel scale--The psychophysical unit of pitch • semitone - used in music; describes the ratio (16/15) in frequency between sounds. (Also used for the half step in the standard chromatic scale) Loudness/Pitch

  9. Complex Signals • Sounds with energy at more than one frequency • Timbre: Sense of voice or identity: conveyed by harmonics and timing patterns.

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