Contralateral insert earphone and ipsilateral probe
Bandwidth:
1600 Hz (nominal -3 dB point)
Slope:
The slope is b12 and +18 dB/octave above 1600 Hz, with an addi-
tional ±6 dB tolerance.
Level:
Noise level is indicated in dB HL. Tolerance ±5 dB.
ANSI & IEC reflex stimulus RETSPL values
Frequencies
(Hz)
Ipsilateral probe
HA-1
[2]
Insert
phone
HA-1
[2]
Insert
phone
HA-2
[2]
Supra-aural
phone
IEC 60318-
3/NBS 9A
[1]
Supra-aural
phone
IEC 60318-1
[1]
500
6.0
6.0
5.5
11.5
13.5
1000
0.0
0.0
0.0
7.0
7.5
2000
2.5
2.5
3.0
9.0
9.0
4000
0.0
0.0
5.5
9.5
12.0
BBN
[3]
6.5
6.0
8.0
12.0
13.5
LBN
[3]
7.5
9.5
8.5
10.5
11.5
HBN
[3]
4.0
5.0
7.5
12.5
14.5
Notes:
1. From ANSI/ASA S3.6-2010, Table 5.
2. From ANSI/ASA S3.6-2010, Table 7.
3. Based on Otometrics internal study
Air pressure system
Range:
200 to -400 daPa/s. Ex400 to -600 daPa/s
Pressure sweep rate:
50, 100, 200, 400, 600 daPa/s ± 20% in 20% to 80% of the total pressure range
Pressure accuracy:
± 10% or ± 10 daPa, whichever is greatest
For probe tones above 226 Hz and volumes below 0.7 cc, additional ± 10 daPa
can occur.
Pump measure direction:
Positive to negative or negative to positive
Safety:
Separate 530 daPa and -730 daPa ±70 daPa
Graph units
Unit of admittance graph Y-axis:
ml, cc, mmho, µl
Unit of graph X-axis:
daPa, sec
Otometrics - MADSEN Zodiac
User Guide
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