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AC40 RETSPL-HL Tabel
Sound attenuation values for earphones
Frequency
TDH39/DD45
with MX41/AR
[Hz]
125
160
200
250
315
400
500
630
750
800
1000
1250
1500
1600
2000
2500
3000
3150
4000
5000
6000
6300
8000
*ISO 8253-1 2010
Attenuation
EAR 3A IP30
or PN 51
EAR 5A
Cushion
[dB]*
[dB]*
3
33
4
34
5
35
5
36
5
37
6
37
7
38
9
37
-
11
37
15
37
18
35
-
21
34
26
33
28
35
-
31
37
32
40
29
41
-
26
42
24
43
HDA200
HDA300
[dB]*
[dB]
15
12.5
15
16
16
12.7
18
20
23
9.4
25
27
29
12.8
30
31
32
15.1
37
41
46
28.8
45
45
44
26.2
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