Operating Instructions MA 53
Geba_MA53_e_13a.doc
49 851 430/3 11/11
Calibration values:
FF : Free sound field (0 degree incidence)
Frequency [Hz]
Reference equivalent threshold
sound pressure level
ISO 389 - 7
[dB] (re 20
Pa
)
ANSI S3.6-1996
[dB] (re 20
Pa
)
125
22
22
250
11
11
500
4
4
750
2
2
1000
2
2
1500
0.5
0.5
2000
-1.5
-1.5
3000
- 6
- 6
4000
- 6.5
- 6.5
6000
2.5
2.5
8000
11.5
11.5
Calibration values:
Insert phone Eartone 3A
Frequency [Hz]
Reference equivalent threshold
sound pressure level
sound damping
ISO 389 - 2
with Coupler IEC 126
[dB] (re 20
Pa
)
ANSI S3.6-1
with Coupler HA-2
[dB] (re 20
Pa
)
[dB]
125
26
26
32.5
250
14
14
36
500
5.5
5.5
37.5
750
2
2
-
1000
0
0
36.5
1500
2
2
-
2000
3
3
33
3000
3.5
3.5
-
4000
5.5
5.5
39.5
6000
2
2
-
8000
0
0
42.5
Содержание MA 53
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