audiometric configurations in children andrea pittman, ph.d. arizona state university
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Audiometric Configurations in Children
Andrea Pittman, Ph.D.Arizona State University
Method
• Groups– 6-year-old children – 60-year-old adults
• Audiogram Selection Criteria– Right ear thresholds only– Thresholds for each octave test frequency
(250-8000 Hz)– At least one threshold > 30 dB HL– Confirmed sensorinueral hearing loss by bone
conduction audiometry– Air-bone gaps < 10 dB
Method
• Core Set of Audiograms– 227 children– 248 adults
• Analyses– Configuration– Asymmetry – Progression
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Insert
TDH
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Insert
TDH
*Transducer Effects
Frequency (Hz)
Heari
ng L
evel (d
B)
*Transducer Effects
NBS 9A Coupler
TDH Series Earphone
Mic
6cm3
*Transducer Effects
ER3A
Mic
2cm3Mic
6cm3
Mic
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Insert
TDH
Frequency (Hz)
Heari
ng L
evel (d
B)
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Frequency (Hz)
Hea
ring
Lev
el (
dB H
L)
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Frequency (Hz)
All Audiograms
Adults (n=248) Children (n=227)
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140
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Frequency (Hz)
Hea
ring
Lev
el (
dB H
L)
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250 500 1000 2000 4000 8000
Frequency (Hz)
All Audiograms
Adults (n=248) Children (n=227)
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140
250 500 1000 2000 4000 8000
Frequency (Hz)
Hea
ring
Lev
el (
dB H
L)
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140
250 500 1000 2000 4000 8000
Frequency (Hz)
All Audiograms
Adults (n=248) Children (n=227)
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140
250 500 1000 2000 4000 8000
Frequency (Hz)
Hea
ring
Lev
el (
dB H
L)
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140
250 500 1000 2000 4000 8000
Frequency (Hz)
All Audiograms
Adults (n=248) Children (n=227)
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140
250 500 1000 2000 4000 8000
Frequency (Hz)
Hea
ring
Lev
el (
dB H
L)
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Frequency (Hz)
All Audiograms
Adults (n=248) Children (n=227)
Audiometric Classification
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Sloping Rising Flat
U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
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Sloping Rising Flat
U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
Results (Mean) Adults
Children
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Sloping Rising Flat
U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
Results (Mean) Adults
Children
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Sloping Rising Flat
U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
Results (Mean) Adults
Children
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Sloping Rising Flat
U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
Results (Mean) Adults
Children
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Heari
ng
Level (d
B)
Frequency (Hz)
Sloping Rising Flat
U-Shaped Tent-Shaped Other
Adults
Children Results (SD)
+1SD
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Heari
ng
Level (d
B)
Frequency (Hz)
Sloping Rising
U-Shaped Tent-Shaped Other
Adults
Children Results (SD)
0
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Heari
ng
Level (d
B)
Frequency (Hz)
Sloping Rising Flat
U-Shaped Tent-Shaped Other
Adults
Children Results (SD)
Distribution of Configurations
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Sloping U-Shaped Tent-Shaped
Flat Other Rising
Adults
Children
Perc
en
t of
Au
dio
gra
ms
Category
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Sloping Rising Flat
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U-Shaped Tent-Shaped Other
Heari
ng
Level (d
B)
Frequency (Hz)
*Sloping Losses Adults
Children
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*Sloping Losses Adults
Children
Heari
ng
Level (d
B)
Frequency (Hz)
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*Sloping Losses Adults
Children
Heari
ng
Level (d
B)
Frequency (Hz)
0
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Sloping U-Shaped Tent-Shaped
Flat Other Rising
% O
F A
UD
IOG
RA
MS
Adults
Children
*Sloping Losses
73%
SlopingAll Other
Adults
33%
Children0
10
20
30
40
50
Sloping U-Shaped Tent-Shaped
Flat Other Rising
% O
F A
UD
IOG
RA
MS
Adults
Children
Asymmetry
0
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120
0 20 40 60 80 100 120
0
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120
0 20 40 60 80 100 120
Asymmetry
Adults Children4000 Hz
Right-ear Threshold
Left
-ear
Thre
shold
*Binaural Fitting StrategiesFrequency (Hz)
Heari
ng L
evel (d
B)
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Left
Right
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Left
Right
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Left
Right
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Left
Right
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Left
Right
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Progression
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Right
Frequency (Hz)
Heari
ng L
evel (d
B)
Baseline Audiogram (6-yr-old) Subsequent Audiogram+15+20+10+10+5+5
-60
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6 7 8 9 10 11 12 13 14 15
Progression
Age at Subsequent Audiogram (years)
Change in T
hre
shold
(dB
)
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220
-80 -60 -40 -20 0 20 40 60 80
Progression
Change in T
hre
shold
(dB
)
Num
ber
of
Thre
shold
s
Summary
• Configuration– Children had a wider variety of
audiometric configurations
• Asymmetry – More children had asymmetric losses and
those asymmetries were more severe
• Progression/Fluctuation– Thresholds increased and decreased on
subsequent audiograms
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Frequency (Hz)H
eari
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evel (d
B)
The End
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