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Lecture 1

PSYC 100 Lecture 1: Psyc 100 week 10

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Queen's University
PSYC 100
Jill L Atkinson

Psyc 100 week 10 • Sound is a wave - Sound results from vibration, this vibration causes adjacent air molecules compressed (region of high air pressure) into local regions of increased pressure and rarefied (region of low air pressure) in location regions of decreased pressure, these pressures changes travel through the air to our ears in a wave - The amplitude of a sound wave determines the sounds’ intensity; intensity is measured in decibel - Frequency: the# of peaks of a wavelength - Most of sounds consist of different frequencies, which can be shown on a spectrum (a graph showing the different frequencies) - - Hearing - Vision - Frequency - Pitch - color - Amplitude - Loudness - brightness - Spectrum - timbre - saturation - the higher the frequency the louder the sound • jumping hair - just-notice difference: minimum level of detectable difference in the magnitude of a stimulus - outer hair cells: act as little motors that detect the movement in the basaliar membrane - frequency resolution: ability to hear two frequencies that are very close to each other as different sounds • cochlear implant (CI): electronic device that can provide a sense of sound to someone who is profoundly hearing impaired • tonotopic organization: • volley principle: an auditory n
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