No hearing protection suits every environment, so you should choose hearing protection for the actual noise environment you work in. That way you will be sure of the right attenuation for your particular situation. You must also take into account the length of time you are exposed to the noise. If you don’t wear earmuffs the whole time, you may sustain irreparable damage to your hearing. Hellberg’s hearing protection is available in three versions.
 

 

 Our HML method will help you determine which of these earmuffs best suits your working environment.
 

Ear cups can be turned to airing and rest position. Ready for use with Hellberg's quick-fit visors. The hearing protection is also available with headband.
     
 
Hellberg 8 Item 21008. Weight 6.2 oz.
Freq. Hz
125
250
500
1k
2k
3.1k
4k
 6,3k
8k
 NRR
CSA
Mean value
11,5
17,4
29,9
32,4
36,6
38,4
39,8
 37,0
37,9
22
B
1 std. deviation
2,8
2,8
3,1
2,5
2,5
2,3
1,9
 2,7
2,7
Hellberg 10 Item 21010. Weight 6.7 oz.
Freq. Hz
125
250
500
1k
2k
3.1k
4k
 6,3k
8k
 NRR
CSA
Mean value
19,2
20.9
31,6
36,9
38,1
40,0
42,8
 43,1
40,8
25
A
1 std. deviation
1,5
1,6
2,4
1,6
2,3
2,2
2,9
 4,0
3,3
Hellberg 12 Item 21012. Weight 8.1 oz.
Freq. Hz
125
250
500
1k
2k
3.1k
4k
 6,3k
8k
 NRR
CSA
Mean value
16,9
24,3
34,9
38,1
37,8
36,6
38,0
 40,3
40,8
28
A
1 std. deviation
2,1
2,5
1,9
2,1
2,6
2,5
2,4
 2,6
3,0
Tested to ANSI S3.19 1974. NVVLAP no. 0427
 
Hellberg Safety AB, Box 3002, S-443 03 Stenkullen, Sweden. Tel. +46 302 244 50. E-mail: info@hellbergsafety.se www.hellbergsafety.com