Maico MA 33 - Page 80

Operation Manual MA 33
8100092 Rev. 9
78
19/08/2019
Calibration values and Max Levels: Headphone DD65v2
Coupler IEC 60318-1, PTB Report 2018, AAU Report 2018
Frequency
[Hz]
Tone
RETSPL
dB re
20µPa
NBN
RETSPL
dB re
20µPa
Tone
Max Level
[dB HL]
Max NBN
[dB HL]
Sound
Attenuation [dB]
ISO 4869-1
125
30.5
34.5
70
60
8.3
250
17.0
21.0
90
80
15.5
500
8.0
12.0
100
90
26.1
750
5.5
10.5
105
95
-
1000
4.5
10.5
105
95
32.4
1500
2.5
8.5
105
95
-
2000
2.5
8.5
105
95
43.6
3000
2.0
8.0
105
95
-
4000
9.5
14.5
105
90
43.8
6000
21.0
26.5
95
80
-
8000
21.0
26.5
90
75
45.4
Signal
IEC 60645-1
RETSPL
IEC Max Level
[dB HL]
ANSI S3.6
RETSPL
ANSI Max
Level [dB HL]
Speech
20.0
90.0
17.0
90.0
Speech Noise
20.0
90.0
17.0
90.0