Flents Protechs, Quiet Please, беруши из пенопласта, 50 пар

• Easy Insertion, Forms To Ear Canal Shape
• Now Softer for More Comfort!
• Noise Reduction Rating NRR 29

Information required by EPA: The level of noise entering a person's ear, when a hearing protector i sworn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR.  

Example:

1) The environmental noise level as measured at the ear is92 dBA. 

(2) The NRR is 29 decibels (dB). 

(3) The level of noise entering the ear is approximately equal to[92 dB(A) - 29] 63 dB(A).

Noise Reduction Rating 29 Decibels (When used as Directed)

The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness).

1. With clean hands, slowly roll plug into a thin, crease-free cylinder.
2. While compressed, insert contoured end of plug into ear canal. Fitting is easier if outer ear is pulled outwards and upwards during insertion.
3. With fingertips, hold plug in place until it begins to expand.