Conclusive Results

This table represents official test results for three of our products. The test measures nine frequencies, from 125 Hz all the way up to 8,000 Hz. The numbers indicate decibel reduction, from 0 to 45. So, for example, at 500 Hz, all three protectors will decrease the volume of noise by about 30 decibels. At 4,000 Hz, they will lower noise volume by more than 40 decibels. No other product line offers this degree of hearing protection.

 

FREQUENCY
125Hz
250Hz
500Hz
1000Hz
2000Hz
3150Hz
4000Hz
6300Hz
8000Hz
Vented G NRR23
27.6
28.7
27.5
28.1
34.5
40.1
42.7
43.3
41.9
Convertible NRR25
29.7
29.9
29.4
29.9
33.6
38.6
38.9
42.7
44.8
Non Vented NRR26
31
31.3
32.3
31.2
35.8
41.5
43.7
42.7
42.7

 


How Do We Compare?

This graph compares the actual noise reduction achieved by dB Blockers, foam ear plugs and ear muffs. In addition to producing the highest-rated hearing protectors in North America, Custom Protect Ear is the only hearing protection manufacturer to earn ISO 9002 Registration. All of our industrial protectors meet or exceed CSA, OSHA, ANSI, WCB and WSIB standards.

dB Blocker Vented2 - NRR 23
Foam ear plugs1 - NRR (29)
Ear muffs - NRR1 (24)

dB Blocker Vented2 - NRR 23
21.25
20.35
38.95
40.63
34.33
Foam ear plugs1 - NRR (29)
13.8
15.64
16.64
19.32
17.94
Ear muffs - NRR1 (24)
7.56
15.12
19.44
18.9
19.44
 

1 Berger, E.H, Franks, J.R. Lindgren, F (1994) E-A-R 94-17/HP
2 Dr. Kevin Michaels, Penn State University, Fitchek™