Textbook Notes (363,145)
Canada (158,221)
Psychology (9,573)
PSYB65H3 (479)
Ted Petit (185)
Chapter 8

Chapter 8 Textbook Notes (Exclude Lecture Covered Materials)

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University of Toronto Scarborough
Ted Petit

PSYB65 Textbook notes Chapter 8: Auditory System 1 THE AUDITORY SYSTEM The Properties of Sound Frequency: refers to the rate of vibration (number of wave cycles completed per unit of time). Human ear can perceive vibrations between 20 and 20,000 Hz. Human are maximally sensitive to sounds between 1000 and 4000 Hz, roughly the frequencies human voice can produce. Pitch: sounds of different frequencies. The higher the frequency, the higher the pitch. Loudness: loudness corresponds to the amplitude (measured in decibels , the sound measure of a source when compared to a standard intensity of 10^-12 watts.) of the sound wave. Complexity: perceived as the sounds timbre. Instruments usually produces overtones that are at frequencies higher than the fundamental frequency, these overtones also vary in their intensities. Auditory Cortex primary auditory cortex is hidden behind the secondary auditory cortex. The neurons are arranged in columns, and the columns in the more anterior regions respond maximally to higher frequencies, whereas neurons in posterior regions respond more to lower frequencies. Most right handers have a left Heschls gyrus that is larger than the right. LANGUAGE SYSTEMS IN THE BRAIN Brocas Area: responsible for the output of language. Wernickes area: responsible for mapping sounds to words (comprehension). The two areas need to be connected to pr
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