Husqvarna X-SYNC HP500BT-01 Operator's Manual page 227

Helmet mounted
Clamping force 2.9 lb
ANSI s3. 19-1974
Frequency,
125
Hz
Mean
attenuation, 19.4
dB
Standard
3.4
deviation, dB
Headband style
Clamping force 11 N
ANSI s3. 19-1974
Frequency,
125
Hz
Mean
attenuation, 19.4
dB
Standard
2.9
deviation, dB
2146 - 004 - 18.12.2023
250 500 1000
25.3 28.4 33.1
3.1 3.3 3.3
250 500 1000
24.8 33.1 38.8
2.6 3.8 2.8
2000 3150 4000
34.8 39.1 37.4
2.9 2.9 3.8
2000 3150 4000
37.9 40.8
39.5
3.2 4 3.8
6300 8000 NRR
40.4
36.6
24
4.7 4,4
6300
8000 NRR
41.5
38.8
27
3.6
5.2
CSA
class
Class A
CSA
class
Class A
227