Download - audiology objectivemeasures
-
7/29/2019 audiology objectivemeasures
1/28
Acoustic Immittance
Otoacoustic Emissions
Auditory Evoked Potentials
Objective Tests
-
7/29/2019 audiology objectivemeasures
2/28
Instrumentation
Ear Canal Measurements
Static Immittance (compliance)
Tympanometry
Acoustic Reflexes
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
3/28
Instrumentation
sound source
air pump
analysis section
acoustic reflex stimulus
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
4/28
Ear canal volume predicted by intensity of reflected sound
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
5/28
-
7/29/2019 audiology objectivemeasures
6/28
Ear Canal Volume Normative Data
Adults
Mean = 1.5 mL
90% range = 0.6 to 1.5 mL
ChildrenMean = 0.7 mL
90% range = 0.4 to 1.0 mL
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
7/28
Static immittance is the measurement of tympanic membrane
and middle ear mobility
Normative Data for Adults
Mean = 0.8 mL
90% range = 0.3 to 1.4 mL
Normative Data for Children
Mean = 0.5 mL
90% range = 0.2 to 0.9 mL
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
8/28
Tympanometry tracks changes in static immittance over time
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
9/28
Tympanometric (Jerger) types
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
10/28
Tympanometric (Jerger) types
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
11/28
Tympanometric Shape (as recommended by ASHA)
Width of the tympanogram at the 50% amplitude point
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
12/28
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
13/28
Normative data fortympanomeric shape
Adults
Mean = 80 daPa
90% range = 50 to 110 daPa
ChildrenMean = 100 daPa
90% range = 60 to 150 daPa
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
14/28
Acoustic Reflex Anatomy and Physiology
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
15/28
Acoustic Reflex Anatomy and Physiology
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
16/28
Acoustic Reflex Threshold
Definition
ART for pure tones = 85 to 95 dB HL for normally hearing
people
ART for Speech = 10 to 20 dB less for pure tones
Doesnt change in people with cochlear loss (up to 50 dB
HL)
Acoustic Immittance
-
7/29/2019 audiology objectivemeasures
17/28
Conductive Loss
Sensorineural Loss
Cochlear Loss
Retrocochlear Loss
Diagnostic Significance
-
7/29/2019 audiology objectivemeasures
18/28
Instrumentation
Otoacoustic Emissions
-
7/29/2019 audiology objectivemeasures
19/28
Function
Otoacoustic Emissions
-
7/29/2019 audiology objectivemeasures
20/28
Transient Otoacoustic Emissions (TOAEs)
Distortion Product Otoacoustic Emissions (DPOAE)
Otoacoustic Emissions
-
7/29/2019 audiology objectivemeasures
21/28
Application
neonatal hearing screening
differential diagnosis
monitoring cochlear damage
Otoacoustic Emissions
-
7/29/2019 audiology objectivemeasures
22/28
Instrumentation
Auditory Brainstem Response Audiometry (ABR)
Other AEPs
Auditory Evoked Potentials
-
7/29/2019 audiology objectivemeasures
23/28
Instrumentation
Auditory Evoked Potentials
-
7/29/2019 audiology objectivemeasures
24/28
Auditory Evoked Potentials
-
7/29/2019 audiology objectivemeasures
25/28
Auditory Brainstem Response (ABR)
Applications
differential diagnosis
auditory threshold testing
neonatal hearing screening
neurosurgical interoperative monitoring
Auditory Evoked Potentials
-
7/29/2019 audiology objectivemeasures
26/28
Interpertation for
ABR
latency
amplitude
morphology
Auditory Evoked Potentials
-
7/29/2019 audiology objectivemeasures
27/28
Auditory Evoked Potentials
Summary of Auditory Evoked Potentials
AEP Site Application
Electrocochleography VIII Nerve Hearing Testing
ABR VIII Nerve and Brainstem See Previous
Middle Latency Response Primary Auditory Cortex Hearing Testing
Late Vertex Response Upper Level Cortex Central Auditory Problems
P300 Frontal Lobe Physiological Psychology
-
7/29/2019 audiology objectivemeasures
28/28
you are not responsible for chapter 7 of text
Summary