Flents Ear Plugs, Soft Foam

No. K30. Read important cautions and EPA noise reduction compliance information on card & in case prior to use. Noise reduction rating: 33 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). Sound Attenuation Data (ANSI Standard S3.19-1974) NRR 33. Frequency (Hz): 125, Hearing Protector Attenuation in dB: 33.1. Standard Deviation: 2.7. Frequency (Hz): 250, Hearing Protector Attenuation in dB: 36.3. Standard Deviation: 1.8. Frequency (Hz): 500, Hearing Protector Attenuation in dB: 36.8. Standard Deviation: 2.1. Frequency (Hz): 1000, Hearing Protector Attenuation in dB: 38.4. Standard Deviation: 1.7. Frequency (Hz): 2000, Hearing Protector Attenuation in dB: 38.7. Standard Deviation: 2.1. Frequency (Hz): 3150, Hearing Protector Attenuation in dB: 44.1. Standard Deviation: 2.3. Frequency (Hz): 4000, Hearing Protector Attenuation in dB: 45.9. Standard Deviation: 2.2. Frequency (Hz): 6300, Hearing Protector Attenuation in dB: 45.4. Standard Deviation: 2.2. Frequency (Hz): 8000, Hearing Protector Attenuation in dB: 46.0. Standard Deviation: 2.4. The attenuation values were obtained under laboratory conditions and are for comparison purposes only. The amount of protection afforded may differ depending on how the protectors are fitted and worn. The attenuation values in actual use may be lower. Made in USA.