GB/T 20062-2017 Mobile cranes—Limits and measurement methods for operating noise

GB/T 20062-2006 Mobile crawler crane—Limits and measurement methods for operating noise

GB/T 3785.1-2010 Electroacoustics—Sound level meters—Part 1:Specifications GB/T 3767-1996 Acoustics—Determination of sound power levels of noise sources using sound pressure—Engineering method in an essentially free field over a reflecting plane GB/T 3767-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 17248.2-1999 Acoustics—Noise emitted by machinery and equipment—Measurement of emission sound pressure levels at a work station and at other specified positions—Engineering method in an essentially free field over a reflecting plane GB/T 17248.2-2018 Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections GB/T 21457-2008 Cranes and related equipment—Accuracy requirements for measuring parameters during testing