Interacoustics AD226 Instructions D'utilisation page 206

General properties for earphones
Sound attenuation values for earphones
Frequency
DD45 or TDH39 with MX41/
AR or PN 51 cushion
[Hz]
125
160
200
250
315
400
500
630
750
800
1000
1250
1500
1600
2000
2500
3000
3150
4000
5000
6000
6300
8000
Attenuation
EAR-Tone 3A
[dB] [dB]
3 33,5
4
5
5 34,5
5
6
7 34,5
9
-
11
15 35,0
18
-
21
26 33,0
28
-
31
32 39,5
29
-
26
24 43,5