PSY100H1 Lecture Notes - Lecture 9: Psychophysics, Inferior Colliculus, Otosclerosis
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PSY100H1 Full Course Notes
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Lecture 9 hearing (chapters 9 & 10) Covert attention: you dont need to move your eyes, occulomotor program is not activated. There"s a close connection btwn shifts of attention and eye movememnts. What is sound? cause molecules in object"s surrounding medium to vibrate as well: vibrations of object: Sound is created when an object vibrates which causes pressure changes in medium. Water: 1500 m/s sound wave depends on density of medium: amplitude: sound wave can be small or pronounced (sound is louder or faint) the height of the wave/magnitude. Intensity: physical measure of how loud something is. Expressed in decibels sound pressure level (db spl): amount of sound energy falling on a unit area, decibels: ratio btwn the pressure of some sound and the pressure of a reference sound p0 (minimum) 6 decibels = twice as loud as something else. 12 decibels = twice as loud as 6 decibels.
