Operation Manual MA 41
8100456 Rev.9
62
01/16
Calibration values: Bone conductor Radioear B81 Force: 4.9 ... 5.9 N Mastoid
placement
Frequency
[Hz]
Reference equivalent
threshold
force level for tone
Air radiation Max level
ISO 389 - 3
[dB] (re 1µN)
ANSI S3.6
[dB] (re 1µN)
mean/max
[dB]
Tone
[dB
HL
]
250
67
67
-
50
500
58
58
-
70
750
48.5
48.5
-
75
1000
42.5
42.5
-
85
1500
36.5
36.5
-
90
2000
31
31
-
90
3000
30
30
4 / 18
85
4000
35.5
35.5
-
85
6000
40
40
10.5 / 31
60
8000
40
40
-
50
Signal
IEC60645-2
RETSPL
IEC Max
Level [dB
HL
]
ANSI S3.6
RETSPL
ANSI Max
Level [dB
HL
]
Speech
35.00
60
55.00
60
SN
35.00
-
55.00
-
WN
42.50
70
42.50
70
Summary of Contents for MA 41
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