Operating Instructions MA 50
Geba_MA50_Fe_11a.doc
22 851 406/2 11/11
Calibration values:
AC-Receiver Telephonics TDH 39 Force: 4 ... 5 N
Frequency [Hz]
Reference equivalent threshold
sound pressure level
sound damping
ISO 389 - 1
with Coupler IEC 318-2
[dB] (re 20
Pa
)
ANSI S3.6-1
with Coupler NBS 9A
[dB] (re 20
Pa
)
[dB]
125
45
45
3
250
25.5
25.5
5
500
11.5
11.5
7
750
7.5
8
-
1000
7
7
15
1500
6.5
6.5
-
2000
9
9
26
3000
10
10
-
4000
9.5
9.5
32
6000
15.5
15.5
-
8000
13
13
24
Calibration values:
BC-Receiver Radioear B 71
Force: 4.9 ... 5.9 N
Frequency [Hz]
Reference equivalent threshold
force level
air radiation
ISO 389 - 3
[dB] (re 1
N
)
ANSI S3.6-1996
[dB] (re 1
N
)
mean / maximum
[dB]
250
67
67
-
500
58
58
-
750
48.5
48.5
-
1000
42.5
42.5
-
1500
36.5
36.5
-
2000
31
31
-
3000
30
30
4 / 18
4000
35.5
35.5
-
6000
40
-
10.5 / 31
Содержание MA 50
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