I
I
c
Transducer
TvPe
Stimulus Tone
Frequency (HZ)
Contra (Insert Phone)
(in HA-l Coupler)
IPSI
(in HA-l Coupler)
Contra (Insert Phone)
(in IEC 711 Coupler)
500 1000
2000
4000
6.0
1.0
6.0
3.0
7.0
4.5 2.0
3.5
9.5
5.5 11.5
15.0
c
Rise/Fall Time:
5 to 10
msec
L.
i
L
i
t
3
9
t
L
i
1
L
1
k
i
k
Pressure:
Automatically set to the pressure of peak compliance
-
20
daPa.
Reflex Determination:
Minimum compliance change
-
0.05
cm
3
Test Time:
Approximately 2 -12 seconds, depending on number of test frequency
selections and if tymp only test. (four maximum)
Probe LED indicators:
Green
-
blinking: Ready to test
Green
-
steady: Test in progress
Orange
-
steady: leak or other error
Yellow
-
steady:
Occlusion
AUDIOMETER
Test Stimulus
Pure Tone
Specifications:
A pure tone is the only stimulus source for this
audiometer.
Discrete
Frequencies:
125,
250,500.750,
1000,1500,
2000,3000,
4000,6000
and8000
Hz.
Equivalent Hearing Threshold Levels. in
dB
SPL for TDH 39 Earphones:
Frequency
(Hz) 125 250 500
750
10001500
Reference
Threshold
(dB)
45.0
25.5 11.5 7.5
7.0 6.5
Frequency
(Hz)
2000
3000
40006000
8000
Reference
Threshold
(dB) 9.0
10.0
9.5 15.5
13.0
Frequency
Accuracy:
+/-
3%
Total Harmonic Distortion (From
125Hz
to 3000 Hz, measured Acoustically at the
Maximum HL, measured electrically at 4000
&
6000 Hz)
<
3%.
6
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