01:615:371 Lecture Notes - Language Module, Categorical Perception, Speech Perception
24 Nov 2013
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Between 20 and 30 vot (msec) is the phonemic boundary, the slope isn"t the same across everywhere. If the slope was constant, there wouldn"t be a phonemic (category) boundary. Lieberman"s motor theory: speech is represented in the mind/brain as articulatory motions (gestural score), not sounds. Know the gestures required to make speech signal (coarticulation) understand speech by determining what gestures produced it. Speech module processes speech and preempts other auditory processing. There is special speech processing module which allows us to do this. The reason there is categorical distinction between /ba/ /pa/ is because that"s what it is in the. Auditory theory of speech perception: speech is perceived just like any other sounds. Speech perception just a reflection of fundamental properties of auditory neurons. 20 ms of each other, perceive as simultaneous. If 2 sounds separated by >20 ms, then perceived as sequential. Categorical distinction occurs outside of speech as well, and applies to sounds such as beeps.
