Maico MA 28 - Calibration Values and Maximum Levels

Operation Manual MA 28
8506915 Rev. 5
46
05/05/2021
6.4 Calibration Values and Maximum Levels
Calibration values and Max Levels: Headphone DD45
Coupler IEC 60318-3
FRE-
QUENCY
[HZ]
TONE
IEC 60318-3
RETSPL DB
RE 20µPA
NBN
IEC 60318-3
RETSPL DB
RE 20µPA
TONE
MAX
LEVEL
[DB HL]
NBN
MAX
LEVEL
[DB HL]
SOUND
ATTENUA-
TION [DB]
ISO 4869-1
125
47.5
51.5
85
65
3
250
27.0
31.0
105
85
5
500
13.0
17.0
110
100
7
750
6.5
11.5
110
105
-
1000
6.0
12.0
110
105
15
1500
8.0
14.0
110
105
-
2000
8.0
14.0
110
105
26
3000
8.0
14.0
110
105
-
4000
9.0
14.0
110
105
32
6000
20.5
25.5
110
95
-
8000
12.0
17.0
105
95
25
White Noise
-
0.0
-
110
-
Table provides max levels for PSE power only. USB power results in reduced max levels.
Calibration values: Insert phones IP30
Coupler IEC 60318-4
FRE-
QUENCY
[HZ]
TONE
IEC 60318-5
RETSPL DB
RE 20µPA
NBN
IEC 60318-5
RETSPL DB
RE 20µPA
TONE
MAX
LEVEL
[DB HL]
NBN
MAX LEVEL
[DB HL]
SOUND
ATTENUA-
TION [DB]
ISO 8253-1
125
26.0
30.0
90
85
33
250
14.0
18.0
105
100
36
500
5.5
9.5
110
105
38
750
2.0
7.0
110
110
-
1000
0.0
6.0
110
110
37
1500
2.0
8.0
110
110
-
2000
3.0
9.0
110
110
33
3000
3.5
9.5
110
110
-
4000
5.5
10.5
110
105
40
6000
2.0
7.0
100
95
-
8000
0.0
5.0
90
90
43
White Noise
-
0.0
-
110
-
Table provides max levels for PSE power only. USB power results in reduced max levels.