Hearing [Compatibility Mode]

Hearing [Compatibility Mode] - Hearing Functions of Hearing...

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1 Hearing Functions of Hearing • Perceiving “what” http://faculty.washington.edu/chudler/flash/sounds.html – Speech –M u s i c • Perceiving “where”----sound localization The Sound Stimulus
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2 Sound Wave: Amplitude and Frequency Sound pressure level and loudness P 0 : Atmospheric pressure P: the maximum pressure of the sound wave Like most psychophysical functions, loudness, as a measure of perception, is a logarithmic function of the pressure ratio, a measure of physical energy. Converting sound pressure ratio to decibel (dB) makes a linear relationship between the SPL and perceived loudness. Frequency Æ Pitch Physical Perceptual Physical and Perceptual Aspects of Hearing Amplitude Æ Loudness Purity Æ Timbre Æ reads as “is the main factor that determines…”
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3 The human audibility curve Humans are more sensitive to medium frequency sound Audible frequency range (human): 20-20,000 Hz Most sensitive range (human): 2000-4000 Hz Hz: cycles/s Audibility differences across species
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4 Functions of the outer ear • Amplification of sound wave through resonance
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Hearing [Compatibility Mode] - Hearing Functions of Hearing...

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