Period:
120 ms
Stimulus On time:
56 ms
Stimulus Off time:
64 ms
Rise/fall time:
5.5 ms
Stimulus presentation control
On-Off ratio:
70 dB (for stimulus level > 95 dB HL)
A weighted SPL in Off:
Contra supra-aural TDH 39: 33 dB
Contra insert phone: 23 dB
Tympanometry accuracy description (daPa/s)
Pump speed
Min.TW, 5% error
(daPa)
Min. TW, 10% error
(daPa)
Min. SA, 5% error
(daPa)
Min. SA, 10% error
(daPa)
200 daPa/s
24
20
18
14
400 daPa/s
38
31
31
23
600 daPa/s
53
43
42
32
Broadband noise
Bandwidth:
400 - 4000 Hz. Tolerance ±5 dB re. 1 kHz level.
Slope:
Spectrum level drops between 4000 and 7000 Hz and remains below -23 dB
re. 1 kHz level for frequencies above 7000 Hz.
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
Otometrics - MADSEN Zodiac
User Guide
28
