WSU AUD 5420 week 10 CAPD

central auditory processing

function of the central auditory nervous system, including sound localization, lateralization, binaural processing, speech perception, etc

central auditory processing disorder

disorder in function of the auditory structures, characterized by impaired ability of the central auditory nervous system to manipulate and use acoustic signals, including difficulty understanding speech in noise & localization of sounds

signs/symptoms of CAPD

appearing not to pay attention due to a noisy environment, difficulty remembering instructions, difficulty hearing the difference between similar sounds or words, difficulty maintaining attention esp to a listening task, difficulty understanding riddles or verbal math problems, hearing ability poorer than expected in relation to pure tone audiogram thresholds

assessment of CAPD

hundreds of tests; synthetic sentence identification, gaps in noise, phonak listening in spatial noise, dichotic testing (digits/sentences); important to rely on evidence-based practices

monotic

stimuli presented to one ear

dichotic

different stimuli presented to each ear simultaneously

corpus callosum

c-shaped band of white brain matter tracts; connects the 2 hemispheres of the brain; transfers info from one side of the cerebrum to the other, largest connective structure in the brain

Broca’s area

responsible for motor speech production

Wernicke’s area

responsible for reception of language

binaural advantages to detection & discrimination

stimuli presented dichotically must reach the left hemisphere, the right ear ascends directly to the left hemisphere while the left ear stimulus ascends to the right hemisphere and crosses the corpus callosum before it reaches the left hemisphere

right-ear advantage

most people have a tendency for better speech perception in the right ear (left ear performance in children improved until 11 years old); believed to be due to the more direct right ear path to Wernicke’s area

management of CAPD

environmental changes, use of listening devices including personal FM systems, compensatory strategies, direct intervention

adults with CAPD symptoms

most common symptom is difficulty hearing in noise

CAPD in adults treatment

receiver in the canal (RIC) hearing aids

improving signal-to-noise ratio in the classroom

carpeting, drapes, acoustic tiles, tennis balls on chair legs, reduce appliance noise, seating arrangements

sound field system

a system designed to improve the signal-to-noise ratio in the classroom through the use of speakers to more evenly distribute the speech signal; improves the learning environment for children regardless of hearing level

MARRS project

mainstream amplification resource room study

pediatric CAPD treatment

students with CAPD with hearing aids performed better on tests than without and that hearing aids should be used as at least a trial for CAPD; FM system usually best treatment option, computer-based auditory learning, written directions, accommodations

role playing compensatory strategy

provides the child with appropriate words needed for self-advocacy, the child takes ownership of their listening situation, the listener is taught effective communication skills

CAPD outcome measurements

teacher & parent questionnaires, assessment of listening skills, general behavior, apparent hearing ability (difficulty understanding speech), and general academic progress