What is noise reduction rating?

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Tags

1. #within
2. #reduction
3. #devices
4. #potential
5. #noise
6. #higher
7. #protection
8. #rating
9. #determine
10. #given
11. #environment
12. #working
13. #hearing
14. #sound
15. #effectiveness
16. #decrease
17. #number
18. #associated
19. #protector
20. #greater
21. #measurement
22. #exposure