Purdue IIE 269 - Speech (5 pages)

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Speech



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Speech

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Lecture Notes


Pages:
5
School:
Purdue University
Course:
Iie 269 -

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Professor Greg Francis 5 27 08 Language Speech IIE 269 Cognitive Psychology Many levels grammar Greg Francis phrases Lecture 29 words All humans who can communicate through spoken language Why do we say razzle dazzle instead of dazzle razzle how does language depend on speech what are the units of speech Illusions Illusions When you hear what I say you think you hear at least separate words Oronyms Mondegreens They hae slay the Earl of Murray and Lady Mondegreen separate syllables They hae slay the Earl of Murray and laid him on the green But you do not words actually overlap in the speech signal it is nearly impossible to take a speech signal and cut it up into separate words The blurriness of speech explains some long held confusions The good candy came anyways The good can decay many ways Mike will row the boat ashore Michael row the boat ashore It s a doggy dog world But Why the blur The ear is a bottleneck analogous to the critical flicker frequency in the eye the ear can distinguish clicks as separate only if they are given at less than 20 hertz 20 clicks per second above that a series of clicks sounds like a continuous buzz Speech is seemingly perceived much better Normal speech provides 10 to 15 distinct phonemes each second Fast speech is 20 to 30 phonemes per second Artificially fast speech is 40 to 50 phonemes per second 1 Professor Greg Francis 5 27 08 Phonemes Phonemes pho neme fo nem n F phoneme fr Gk phonemat phonema speech sound utterance fr phonein to sound ca 1916 a member of the set of the smallest units of speech that serve to distinguish one utterance from another in a language or dialect the p of pat and the f of fat are two different phonemes in English Speech is made of phonemes Different combinations of phonemes correspond to different syllables and words We seemingly hear more phonemes than the ear can actually handle how Packing Packing If the ear can only distinguish up to 20 sounds per second and we can interpret speech that seems to



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