H31A
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
A:B Neckband earmuff with foam cushions
Optime I H510B
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
Optime II H520B
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
Optime III H540B
A:2 MV (dB)
A:3 SD (dB)
A:4 APV = MV - SD (dB)
A:6 S, M, L
A:1 f (Hz)
125
250
500
1000 2000 4000 8000
14.3
19.9
30.6
39.4
3.6
2.7
2.1
2.8
10.7
17.2
28.5
36.6
A:1 f (Hz)
125
250
500
1000 2000 4000 8000
11.6
15.7
28.0
33.2
3.2
1.8
2.4
3.0
8.4
13.9
25.6
30.2
A:1 f (Hz)
125
250
500
1000 2000 4000 8000
13.8
20.5
33.1
37.4
2.8
1.6
2.4
2.4
11.0
18.8
30.7
35.0
A:1 f (Hz)
125
250
500
1000 2000 4000 8000
17.6
24.8
36.2
38.0
2.6
2.3
2.2
3.3
15.0
22.6
34.0
34.7
35.9
34.8
34.4
35.5
3.4
3.9
2.2
2.4
32.5
30.9
32.2
33
36.8
39.5
35.8
36.4
2.5
2.8
3.4
1.8
34.3
36.7
32.4
35
37.1
40.1
37.1
38.1
2.9
2.7
3.0
1.9
34.2
37.3
34.1
36
36.5
39.4
38.0
37.6
3.5
3.2
2.9
2.6
33.1
36.2
35.1
35
A:5
H
M
L
SNR
30.1
21.4
31.6
2.3
3.0
2.1
28
18
30
A:5
H
M
L
SNR
26.5
17.7
28.9
1.6
2.3
1.8
25
15
27
A:5
H
M
L
SNR
30.6
21.3
32.6
1.5
2.1
1.6
29
19
31
A:5
H
M
L
SNR
33.6
25.5
35.1
1.7
2.2
1.6
32
23
34
165g
141g
185g
281g