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Calibration values: High Frequency Headphone DD450
Coupler IEC 60318-1
IEC 60318-1
FREQUENCY
[HZ]
RETSPL DB
RE 20µPA
125
250
500
750
1000
1500
2000
3000
4000
6000
8000
White Noise
Table provides max levels for PSE power only. USB power results in reduced max
levels.
Calibration values: Bone conductor Radioear B71 / B81
Coupler IEC 60318-6, mastoid placement
FREQUENCY
[HZ]
250
500
750
1000
1500
2000
3000
4000
6000
8000
Table provides max levels for PSE power only. USB power results in reduced max levels
8506915 Rev. 5
TONE
NBN
IEC 60318-1
RETSPL DB
RE 20µPA
30.5
34.5
18.0
22.0
11.0
15.0
6.0
11.0
5.5
11.5
5.5
11.5
4.5
10.5
2.5
8.5
9.5
14.5
17.0
22.0
17.5
22.5
-
0.0
REFERENCE EQUIVALENT
THRESHOLD
FORCE LEVEL FOR TONE
ISO 389 – 3 / ANSI S3.6
[DB] (RE 1µN)
67.0
58.0
48.5
42.5
36.5
31.0
30.0
35.5
40.0
40.0
Operation Manual MA 28
TONE
MAX
LEVEL
[DB HL]
95
105
110
110
110
110
110
110
110
100
100
-
AIR
RADIATION
MIN/MAX
[DB]
-
-
-
-
-
-
80
-
50
-
47
NBN
SOUND
ATTENUA-
MAX
TION [DB]
LEVEL
ISO 4869-1
[DB HL]
70
15
85
16
90
23
95
-
95
29
95
-
95
32
95
-
95
46
85
-
85
44
110
-
MAX LEVEL
TONE
[DB HL]
45
65
70
70
70
75
80
80
50
40
05/05/2021
.
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