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C:A - Headband with foam cushion - ANZ
MT74H52A-110
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 2.9 2.7 2.7 2.7
C:4 Mean minus SD
MT74H52A-111
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 2.9 2.7 2.7 2.7
C:4 Mean minus SD
HT52A-112, HT52A-112-50
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 2.9 2.7 2.7
C:4 Mean minus SD
C:B - Hard hat attachment with foam cushion - ANZ
MT74H52P3E-110
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 4.0 3.8 3.7
C:4 Mean minus SD
MT74H52P3E-111
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 4.0
C:4 Mean minus SD
HT52P3E-112, HT52P3E-112-50
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 4.0 3.8 3.7
C:4 Mean minus SD
C:C - Neckband with foam cushion - ANZ
MT74H52B-110
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 3.6 3.3 3.4 2.9
C:4 Mean minus SD
MT74H52B-111
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 3.6 3.3
C:4 Mean minus SD
HT52B-112
C:1 Frequency (Hz)
C:2 Mean attenuation (dB)
C:3 Standard deviation (dB) 3.6 3.3
C:4 Mean minus SD
125 250 500 1000 2000 4000 8000 SLC
19.7 19.8 29.0 38.0 35.0 34.2 37.4
2.8
16.8 17.1 26.3 35.3 32.2 31.9 33.3
125 250 500 1000 2000 4000 8000 SLC
19.7 19.8 29.0 38.0 35.0 34.2 37.4
2.8
16.8 17.1 26.3 35.3 32.2 31.9 33.3
125 250 500 1000 2000 4000 8000 SLC
19.7 19.8 29.0 38.0 35.0 34.2 37.4
2.7
2.8
16.8 17.1 26.3 35.3 32.2 31.9 33.3
125 250 500 1000 2000 4000 8000 SLC
17.8 19.8 28.5 33.9 34.0 32.7 36.2
3.5
3.6
13.8 16.0 24.8 30.4 30.4 29.6 31.9
125 250 500 1000 2000 4000 8000 SLC
17.8 19.8 28.5 33.9 34.0 32.7 36.2
3.8 3.7 3.5
3.6
13.8 16.0 24.8 30.4 30.4 29.6 31.9
125 250 500 1000 2000 4000 8000 SLC
17.8 19.8 28.5 33.9 34.0 32.7 36.2
3.5
3.6
13.8 16.0 24.8 30.4 30.4 29.6 31.9
125 250 500 1000 2000 4000 8000 SLC
18.4 18.9 27.7 35.1 36.9 34.7
2.7
14.8 15.6 24.3 32.2 34.2 31.1
125 250 500 1000 2000 4000 8000 SLC
18.4 18.9 27.7 35.1 36.9 34.7 37.2
3.4 2.9
2.7
14.8 15.6 24.3 32.2 34.2 31.1 33.9
125 250 500 1000 2000 4000 8000 SLC
18.4 18.9 27.7 35.1 36.9 34.7 37.2
3.4 2.9
2.7
14.8 15.6 24.3 32.2 34.2 31.1 33.9
Class
80
31
5
2.3
4.1
Class
80
31
5
2.3
4.1
Class
80
31
5
2.3
4.1
Class
80
3.1
4.3
29
5
Class
80
29
5
3.1
4.3
Class
80
29
5
3.1
4.3
Class
80
37.2
30
5
3.6
3.3
33.9
Class
80
30
5
3.6
3.3
Class
80
30
5
3.6
3.3
AZ/NZS 1270:2002
Clamping
force (N)
MT74H52A-110
292 g
10.7
Clamping
force (N)
MT74H52A-111
300 g
10.7
HT52A-112
Clamping
force (N)
273 g
HT52A-112-50
10.7
275 g
AZ/NZS 1270:2002
Clamping
force (N)
MT74H52P3E-110
243 g
9.6
Clamping
force (N)
MT74H52P3E-111
251 g
9.6
HT52P3E-112
Clamping
force (N)
224 g
HT52P3E-112-50
9.6
226 g
AZ/NZS 1270:2002
Clamping
force (N)
MT74H52B-110
275 g
12
Clamping
force (N)
MT74H52B-111
282 g
12
Clamping
HT52B-112*
force (N)
256 g
12
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