1. Speechreading
Perry C. Hanavan

2. Speechreading Lip cues Facial expression cues Gesture cues
Body language cues
Linguistic
Situational cues
Auditory cues*

3. Speechreading for Communication
Normal hearing adults
Infants

4. Good Speechreaders Gender (Dancer et al 1994) Age (Honnel et al 1991)
Linguistic ability
Modal differences (Erber, 1974)
Neurophysiological (Summerfield, 1992)
Cognitive (Ronnberg et al, 1999)

5. Difficulty of Speechreading
Visibility of sounds
Rapidity of speech
Coarticulation and stress effects
Talker effects
Visemes and homophenes

6. Speechreading Enhancement
Ratio or comparison of:
Vision alone : Vision +Audition
The greater the difference between the two scores, the greater the amount of enhancement provided by the auditory signal.