This standard applies to personal hearing protection against noise - earphones and establishes
GOST R 12.4.208-1999 Referenced Document
GOST R 12.4.211-1999 Occupational safety standards system. Hearing protectors. Subjective method for the measurement of sound attenuation
GOST R 12.4.212-1999 Occupational safety standarts system. Hearing protectors. Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
GOST R 12.4.213-1999 Occupational safety standards system. Hearing protectors. Simplified method for the measurement of insertion loss off ear-muff type protectors for quality inspection purposes
GOST R 12.4.208-1999 history
2011GOST R 12.4.255-2011 Occupation safety standards system. Personal hearing protective equipment. General technical requirements. Mechanical test methods
1999GOST R 12.4.208-1999 Occupational safety standards system. Hearing protectors. Ear-muffs. General technical requirements. Methods of testing
GOST R 12.4.208-1999 Occupational safety standards system. Hearing protectors. Ear-muffs. General technical requirements. Methods of testing was changed to GOST R 12.4.255-2011 Occupation safety standards system. Personal hearing protective equipment. General technical requirements. Mechanical test methods.