Operation Manual touchTymp MI 26 and MI 36 Version
8511780 Rev. 4
86
30/06/2021
6.4 Calibration Values and Maximum Levels
6.4.1 Calibration Values and Maximum Levels
– Immittance
COUPLER TYPES USED BY CALIBRATION
IOWA Probe (probe
system):
Calibrated using a IEC 60318-5 (2cc) acoustic coupler made
in accordance to MAICO Standard Values
IP30:
Calibrated using a IEC 60318-5 (2cc) acoustic coupler made
in accordance to ISO 389-2:1994
DD45C:
Calibrated using a IEC 60318-3 (6cc) acoustic coupler made
in accordance to RadioEar Standard Values
REFERENCE VALUES FOR STIMULUS CALIBRATION
Fre-
quency
[Hz]
Reference equivalent threshold sound pressure level [RETSPL,
dB re. 20
Pa]
IP30
ISO 389-2
DD45 C
IOWA Probe
MAICO Standard
Values
RadioEar
Standard
Values
SOUND
ATTENUA-
TION [dB]
ISO 4869-1
500
5.5
13.0*
7
9.5*
1000
0.0
6.0*
15
6.5*
2000
3.0
8.0*
26
12.0*
4000
5.5
9.0*
32
3.5*
BB
-5.0*
-8.0*
-
-5.0*
LP
-7.0*
-6.0*
-
-7.0*
HP
-8.0*
-10.0*
-
-8.0*
*All values marked with a star are RadioEar/MAICO Standard Values.
FREQUENCIES AND MAXIMUM VALUES FOR IMMITTANCE
Center
Frequency
[Hz]
Intensities [dB HL]
IP30
DD45 C
IOWA Probe
Tone/Noise
Tone/Noise
Tone/Noise
500
110
120
100
1000
120
120
105
2000
120
120
105
4000
120
120
100
BB
115
120
95
LP
120
120
100
HP
120
120
95
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