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Universal Ear Protectors – Technical Spec

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F in Hz*/NEM Norm 352-2 125 250 500 1000 2000 4000 8000 H M L SNR
Mf in dB Universal 12.3 13.2 14.6 17.5 20.9 19.2 23.5 16 13 11 16
Sf in dB . 4.1 4.0 4.0 3.7 3.2 4.7 4.9 . . . .
APV in dB . 8.1 9.1 10.7 13.9 17.7 14.5 18.6 . . . .

 

clip image004 003 Universal Ear Protectors Technical data

 

F in Hz Frequency in Hertz
H Average attenuation characteristics in the higher freq. spectrum (x>2000Hz)
M Average attenuation characteristics in themed-range freq. spectrum (500<x>2000Hz)
L Average attenuation characteristics in the lower freq. spectrum (x<500Hz)
SNR Average attenuation characteristics in the standard freq. spectrum (Single number rating)
Mf in dB Average attenuation characteristics at given freq. f in decibel (ISO 4869-2: 1994)
Sf in dB Standard deviation at given frequency f in decibel
APVf in dB Average attenuation characteristics per freq. minus the standard deviation in decibel (Assumed protection value)

 

 

clip image002 029 Universal Ear Protectors Technical data These patented Universal Ear Plugs utilise a technology that replicates the natural resonance of the ear canal, so that sounds can be as clearly heard as the original but 16dB lower. 

Tested to Annex II of EC-directive 89/686/EC and prEN 352-2, for compliance, Universal Ear Plugs are an essential reuseable hearing protector for noisy environments that provides attenuation characteristics suitable for noise levels of up to 100dB(A)

 

Supplied complete with handy carrying pouch, instructions and detachable cord

clip image004 004 Universal Ear Protectors Technical data