Download Hearing Assessment

CSD 2230
HUMAN COMMUNICATION
DISORDERS
Topic 5
Hearing Disorders and Hearing Loss
Assessment
Hearing Assessment
Main questions
1. Is hearing normal?
2. What is the degree
of hearing loss?
3. What type of
hearing loss is it?
Hearing Assessment
Procedrues
Behavioral Measures
Measures of hearing behavior dependent
on the perceptions and cooperation of
the listener
Nonbehavioral Measures
Acoustic or physiological responses
recorded in association with an acoustic
event
Pure Tone Audiometry
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Major behavioral auditory measure
Measurement of pure tone thresholds between 2508000 Hz
Air conduction
Bone conduction
Pure Tone Audiometry
The results of PTA tell us
1. Air conduction thresholds across
frequency tells us if hearing is normal or
not
2. If hearing by air conduction is NOT
normal, the thresholds tell us the degree
of hearing loss
Average Air Conduction
Threshold and the Degree of
Hearing Loss
Pure Tone Audiometry
The results of PTA tell us
1. Hearing by air conduction across frequency in each ear
tells us if hearing is normal or not
2. If hearing by air conduction is NOT normal, the thresholds
tell us the degree of hearing loss
3. Differences between hearing by air conduction and hearing
by bone conduction tell us the type of hearing loss
Air Conduction vs Bone
Conduction Testing
n
Air conduction tests
the entire auditory
system. Bone
conduction
bypasses the
conductive
mechanism, so it
tests only the inner
ear.
The Audiogram
What the Audiogram Says
About the Impairment
Within normal limits
Mild
Moderate
Severe
Profound/deaf
Determining the Type of
Hearing Loss
What the Audiogram Says
About the Impairment
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The degree of hearing loss
The configuration of the hearing loss
The type of hearing loss
Conductive
 Sensorineural
 Mixed
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Speech Audiometry
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Another behavioral measure of auditory
ability
Speech thresholds
 Speech
Reception threshold
 Speech Awareness threshold

Word recognition testing
Identifying Hearing Loss
Through the First Year
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Communication checklists
Parents’ reports
Case history
Informal observation
Formal testing

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Visual Reinforcement Audiometry
Behavioral Observation Audiometry
Sound Field Arrangement for
VRA
Typical Response Levels to
Sounds from Birth-2 years
Nonbehavioral Measures of
Hearing

Auditory brainstem
evoked response
(ABER)
Nonbehavioral Measures of
Hearing

Otoacoustic
Emissions