Service Manual MA 42
D-0125965 Rev. D
47
18/05/2022
Calibration values and Max Levels: Insert Phones IP30
Coupler (2cc) IEC 60318-5 made in accordance to ISO 389-2, ANSI S3.6
Frequency
[Hz]
Tone/Ped.
Noise
RETSPL
dB re 20µPa
NBN
RETSPL
dB re 20µPa
Tone/Ped.
Noise
Max Level
[dB HL]
Max NBN
[dB HL]
Sound
Attenuation
[dB]
ISO 8253-1
125
26.0
30.0
90/78
85
33
250
14.0
18.0
105/93
100
36
500
5.5
9.5
110/98
105
38
750
2.0
7.0
115/103
110
-
1000
0.0
6.0
120/118
110
37
1500
2.0
8.0
120/118
110
-
2000
3.0
9.0
120/118
110
33
3000
3.5
9.5
120/118
110
-
4000
5.5
10.5
115/103
105
40
6000
2.0
7.0
100/88
95
-
8000
0.0
5.0
90/78
90
43
Signal
Speech
Speech Noise
White Noise
IEC 60645-1 RETSPL
20.0
20.0
0
IEC Max Level [dB HL]
95
90
110
ANSI S3.6 RETSPL
12.5
12.5
0
ANSI Max Level [dB HL]
105
100
110
JIS T 1201-2 RETSPL
14.0
14.0
n/a
JIS Max Level [dB HL]
101
96
n/a
