Test according to ANSI Specs S3.19-1974
The level of noise entering a person's ear, when hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR.
Noise Reduction Rating 32 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).
|Attenuation Chart (ANSI S3.19-1974)|
|Mean Attenuation (dB)||38.4||40.3||43.2||41.8||38.6||45.0||45.7||49.6||47.3|
|Standard Deviation (dB)||2.9||3.5||4.0||3.8||2.6||2.8||3.5||3.8||4.3|
Easy Instructions: Ear plugs must be inserted properly for optimum performance.
Practice of insertion is recommended. Discard product after several uses or as soon as dirt or wax accumulates on ear plugs.
Keep away from infants. This product is non-toxic but may interfere with breathing if caught in windpipe.
For noise environments dominated by frequencies below 500 Hz, the C-weighted environmental noise level should be used. Improper fit 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 indictor of the protection attainable against impulsive noise such as gunfire. The Noise Reduction Rating (NRR) calculated from the attenuation data is 32 dB. Hearos ear plugs must be properly fitted to attenuate noise effectively. Refer to instructions.