Datasheet

06/2016 - DOCGB1359B - n° 1359B - GB -This is a non-contractual document subject to printing errors, reproduction is prohibited. Ma Boîte de Com’
Hearing protection decreases very quicky when the
protector is not worn continuously
DAY
1
2 mn of non-use (during 8h) => reduce the
protective ecacy of 25%
2 h of non-use (during 8h) => loss of protective
eectiveness of 75%
Wearing rate
• SNR (Single Number Rating) : Single average value of attenuation.
• HML : Attenuation values expressed in terms of average levels of frequency:
H : Attenuation of PPE at high frequencies (pitched noises)
M : Attenuation of PPE at medium frequencies
L : Attenuation of PPE at low frequencies (bass sounds)
How do you use the attenuation values?
80 - 104 dB
89 - 109 dB
93 - 114 dB
100 - 124 dB
20 - 24 dB
SNR
25 - 29 dB
30 - 34 dB
35 - 39 dB
Attenuation values for noise
UTC : Under the chin OTH : Over the head
BTH : Behind the head
NOISE
Requirements Directive 2003/10/EC:
Minimum requirements for the protection of workers against the
risks related to noise exposure
8 hours exposure time
at ≥ 85 dB(A)
8 hours exposure time
at ≥ 85 dB(A)
8 hours exposure time
at > 75 dB(A) and ≥ 80 dB(A)
Obligatory hearing
protection
Hearing protectors available
to the worker
Hearing protection
recommended
v
• EN352: Exigences of safety and tests.
• EN352-1: the ear-mu.
• EN352-2: the earplugs.
• EN352-3: the adjustable head defenders for the safety helmets.
• EN352-6: Earmus with electrical audio input.
• EN352-8: Audio enabled earmus.
These standards establish requirements with regards to the manufacture, the design,
performances and test methods.
They stipulate the putting at disposal relative to the characteristics.
• EN458: Hearing protection.
Recommendations for selection, use and maintenance.
Standards