Flents Protechs, Бесшумные беруши из быстродействующей пены, 5 пар + футляр

• Noise Reduction Rating NRR 30
• Smooth, Tapered Foam for A Soft, Comfortable Fit
• Tapered for Comfortable Fit
• Not Made with Natural Rubber Latex

Noise Reduction Rating: 30 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)

Information required by EPA: The level of noise entering a person's ear, when a hearing protector is worn 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 is 92 dBA. 
2. The NRR is 30 decibels (dB). 
3. The level of noise entering the ear is approximately equal to [92 dB(A) - 30] 62 dB(A). 

1. With clean hands, slowly roll plug into a thin, crease-free cylinder.
2. While compressed, insert 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.