GB/T 7584.3-2011 Acoustics—Hearing protectors—Part 3:Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture

GB/T 6031-1998 Rubber,vulcanized or thermoplastic—Determination of hardness (hardness between 10 IRHD and 100IRHD) GB/T 20441.4-2006 Measurement microphones—Part 4:Specifications for working standard microphones JJF 1059-1999 GB/T 3241-1998 Octave-band and fractional-octave-band filters GB/T 3241-2010 Electroacoustics—Octave-band and fractional-octave-band filters GB/T 3769-1983 Scales and sizes for plotting frequency characteristics and polar diagrams GB/T 3769-2010 Electroacoustics—Scales and sizes for plotting frequency characteristics and polar diagrams GB/T 7584.1-2004 Acoustics-Hearing Protectors—Part 1:Subjective method for the measurement of sound attenuation GB/T 7584.2-1999 Acoustics—Hearing protectors—Part 2:Estimation of effective A-weighted sound pressure levels when hearing protectors are worn GB/T 3241.2-2025 Electroacoustics—Octave-band and fractional-octave-band filters—Part 2:Pattern evaluation tests GB/T 3241.1-2025 Electroacoustics—Octave-band and fractional-octave-band filters—Part 1:Specifications GB/T 7584.2-2026 Acoustics—Hearing protectors—Part 2:Estimation of effective A-weighted sound pressure levels when hearing protectors are worn GB/T 7584.1-2026 Acoustics—Hearing protectors—Part 1:Subjective method for the measurement of sound attenuation

ISO 4869-3:2007