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9.AR-Visual Communic
Aural Rehab SLP401
Term | Definition |
---|---|
Visual communication | 1.Manual (sign-languages) 2.Oral (Speechreading) -Both require vision |
Speech reading | Includes all available visual info, not just lips. Less emphasis now on SR, more on AR due to wide range of hearing loss accommodated by modern HAs. |
Speech reading factors (4) | Speaker. Signal code. Environment. Speech reader. |
Factors promoting comprehension of SPEAKER (7) | Familiarity. Facial expressions. Common gestures. Face-to-face position. Slightly slower rate. Precise, non-exaggerated articulation. Non-verbal cues (consistent w/message) |
Things for SPEAKER to avoid (4) | Chewing. Smoking. Yawning. Postures (hand over mouth) |
SIGNAL CODE (2) | Acoustic units of language: phonemes (consonants, vowels) Visual units of language: visemes. |
SIGNAL CODE: Visemes | 50% of words are visually indistinguishable (homophones/homophenes) 60% of phonemes are not visible (cognate pairs). Manner and voicing cues are invisible. 17-33% of speech is visible. |
SIGNAL CODE: Viseme clues | Constraints: words, sentences, context, topic. Context helps, but children don't have as much background info. Redundancy |
ENVIRONMENT (5 factors) | Distance (5ft). Viewing angle (0-45 deg). Competition (minimize bg noise). Lighting. Situational cues. |
SPEECHREADER (6) | Residual hearing. Age (improves then declines). Personality traits (motivation). Visual acuity/processing speed/perception. Visual closure (gap-filling). Gender (females a little better). |
Assessment of Speechreading Ability (Tests) | Nonsense syllables/paragraphs. Adult: open set verbal response. Children: closed set, picture ID. Administred via videotape or face-to-face (video yields more consistent results) |
Dependence on vision | When both residual hearing and speechreading are available, the listener will do better than with each component individually. |
Analytic and synthetic approaches to speechreading instruction | CDT- continuous discourse tracking. |
Analytic activities | 1.Discrimination of syllable pairs w/same or different initial consonants. 2.Locate a given initial consonant among several choices. 3.Identify a spoken word from a printed list. |
Synthetic activities | 1.Provide 4-6 words related to a picture. 2.Identify words pertaining to a category 3.Answer questions based on a paragraph. |
Trends in speechreading instruction | Combined A/V training. Self instruction (computerized). Less long-term instruction (gains tail off). Incorporation in aural rehab program. |
Common Aural Rehab Program | Understanding hearing loss. Using assistive listening devices. Using communication strategies and speechreading. Effective use of hearing aids. |
Manual Communication systems (4) | Sign language (ASL). Sign Systems [Seeing Essential English (SEE I); Signing Exact English (SEE II)]. Fingerspelling. Cued speech (8 hand shapes & 4 positions in conjunction with lip movements) |