
Hearing protection users demand a high level of comfort, excellent noise reduction properties as well as ease of insertion. quadBlock is a universal size ear plug, designed to be used repeatedly, with maximum comfort and effectiveness. Safety and health professionals demand an ear plug which is easy to administer and offers a high level of hygiene. quadBlock acquires excellent attenuation, high visibility color that is easy to monitor and a sturdy, stylish handle that every user would like it.
Freq.Hz | 125 | 250 | 500 | 1000 | 2000 | 3150 | 4000 | 6300 | 8000 | NRR |
Mean | 29.4 | 30.8 | 31.8 | 32.1 | 33.1 | 37.8 | 36.8 | 39.5 | 39.5 | 25 dB |
Std. Dev. | 4.3 | 4.0 | 3.9 | 3.3 | 2.6 | 3.6 | 3.3 | 4.5 | 2.8 | 25 dB |