day10 - Psychology 2050 Perception Day 10 28 Sept 10 1st...

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Psychology 2050 Perception Day 10 28 Sept 10 1st Prelim: 5 Oct, in class Review session: 4 Oct, 6-8 PM, Uris 202
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    Speech Perception demonstrations - categorical perception discrimination functions identification functions discriminability = identifiability speech production -- source-filter theory harmonics  formants habituation & dishabituation
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speech demos: synthesis by hand synthesis by rule the “oldest” synthetic speech http://www.youtube.com/watch?v
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speech demos: temporal patterning gaps slowed speech
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source filter Instruments to  change shape  of filter
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speech stream: vowels: monophthongs: /i/ /a/ /u/, etc. diphthongs: /ei/ /oi/, etc. consonants: stops: prevoiced: -- voiced: /b/ /d/ /g/ voiceless: /p/ /t/ /k/ /?/ liquids: voiced /l/ /r/ voiceless: -- fricatives: voiced: /v/ /z/ /δ/ , etc. voiceless: /f/ /s/ /Θ/ /∫ /, etc. clicks: -- /!/ YOU DON’T NEED TO KNOW THESE
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/i/, /a/, /u/ are the cardinal vowels that delimit the gestures of the tongue and vocal tract
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harmonic structure  from source,  sawtooth waveform vocal folds/glottis
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Upper harmonics are integer multiples of  the fundamental frequency schematization  of male source
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mouth shape acts as a selective filter,  removing energy from some harmonics,  enhancing others
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testosterone target  in puberty
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schematization of female source,  sawtooth wave of higher frequency
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Chas. Hockett: The speech stream is like smashed Easter eggs
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formant  transitions demo
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demo
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categorical perception: two types of results (for adults) identification task discrimination task
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method of  constant  stimuli: identification
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day10 - Psychology 2050 Perception Day 10 28 Sept 10 1st...

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