Hearos Ear Products Hearos Water Protection Ear Filters w/ case 2 pc by Hearos details:
| Attenuation Chart (ANSI S3.19-1974) |
| Frequency | 120 | 250 | 500 | 1000 | 2000 | 3150 | 4000 | 6300 | 8000 |
| Mean Attenuation (dB) | 31.6 | 32.1 | 32.2 | 36.9 | 35.7 | 37.0 | 35.7 | 38.7 | 40.5 |
| Standard Deviation (dB) | 4.3 | 4.6 | 4.8 | 4.0 | 3.3 | 3.3 | 4.2 | 5.1 | 3.4 |
Example:
- The environmental noise level as measured at the ear is 92 decibels dB (A)
- The NRR is 25 decibels (dB)
- The level of the noise entering the ear is approximately 67 dB (A).
Noise Reduction Rating: 25 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).
Warnings
If ear plugs become cut, cracked or unpliable, replace with a new HEAROS ear plug. Not intended for sleeping or any applications where pressure could be applied against stem.
Keep away from infants. This product is non-toxic but may interfere with breathing if caught in windpipe.
Remove slowly with twisting motion to gradually break seal. Due to the excellent seal characteristics, rapid removal may damage ear drum.
For noise environments dominated by frequencies below 500 Hz, the C-weighted environmental noise level should be used. Improper fir of this device will reduce its effectiveness in attenuating noise. Consult the above instructions for proper fit. Although hearing protectors can be recommended for protection against the harmful effects of impulsive noise, the Noise Reduction rating (NRR) is based on the attenuation of continuous noise and may not be an accurate indicator of the protection attainable against impulsive noise such as gunfire.
