Pitch Perception - Pitch Perception Or, what happens to the...

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Pitch Perception Or, what happens to the sound from the air outside your head to your brain….
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Sensitivity of the human ear: varies with pitch varies with loudness
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Perception of one pitch Most sensitive around 3000 Hz. Least sensitive at high and low ends High frequency sensitivity decreases with age (and damage to ear)
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Frequencies important for music Frequency range of piano 27.5-4224 Hz. Frequency range of voice fundamentals: • low C for bass - 65 Hz. • high F for soprano - 1397 Hz. (important overtones are higher)
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Pitch is determined by hair cells on basilar membrane 2/3 of basilar membrane accounts for range of 100-4000 Hz. Membrane has a logarithmic scale; jump of one octave anywhere in range is about the same jump on membrane (3.5-4 mm)
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“Just Noticable Difference” When presented with two tones in succession, when are they the same and when are they different? Slow change: detection of .5% at 2000 Hz. (only 10 Hz.!) 1% at 350 Hz. 3% at 100 Hz. (Try this with oscillator) Fast change: much more sensitive
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Absolute pitch (also known as “perfect” pitch) Ability to identify the note name of a sound, or to reproduce a specific note,
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Pitch Perception - Pitch Perception Or, what happens to the...

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