PSYC 2501 Lecture Notes - Lecture 22: Speech Segmentation, Speech Perception, Lip Reading
26 Apr 2018
School
Department
Course
Professor
Problems with Language
• Problems faced by speech perceivers
▪ Coarticulation
• Producing more than one sound at one time
▪ Speaker variability
• No two speakers produce a sound in the same way
• Males vs females
• Adults vs children
• Different dialects and accents
• Differences within one speaker
• Tired, something in your mouth, yawning, etc.
▪ Speech segmentation
• We are able to perceive individual words from a continuous
flow of the speech signal
• Our ability to segment speech when there are no breaks
between words shows that our knowledge of language
influences our perception
• We use the transitional probabilities of sounds to segment
speech
• Certain sounds are more likely to follow one another
within a word, and some sounds are more likely to occur
between two words
• Pretty baby
• Ty more likely to follow e in pretty than ba to follow
ty
• How do we get around these problems of coarticulation and speaker
variability?
▪ Lip and mouth movements
• McGurk effect
• /ba/ vs /va/
• What does the McGurk effect show us?
• Speech perception is multimodal
• It relies on both auditory and visual
information
• Visual speech can actually change what you hear
• We use lip and mouth movements in speech
perceptions to help us disambiguate the signal
• /b/ may sound different in different circumstances,
but we all produce /b/ in the same way
▪ Context
find more resources at oneclass.com
find more resources at oneclass.com
