Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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GB/T 20441.6-2017 Electroacoustics-Measurement microphones-Part 6:Electrostatic actuators for determination of frequency response $370.00 via email in 1~5 business day valid
GB/T 20441.7-2025 Electroacoustics—Measurement microphones—Part 7: Values for the difference between free-field and pressure sensitivity levels of laboratory standard microphones $270.00 via email in 1~3 business day valid
GB/T 20441.8-2025 Electroacoustics—Measurement microphones—Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison $435.00 via email in 1~5 business day valid
GB/T 20787-2006 Classification system and test methods for nonmetallic gasket materials - Part 11: Standard practice for determining resistance of synthetic polymeric materials to fungi $170.00 via email in 1~3 business day superseded
GB/T 21229-2007 Acoustics - Determination of sound power levels of noise from air-terminal devices air-terminal units dampers and valves by measurement in a reverberation room $280.00 via email in 1~3 business day valid
GB/T 21230-2007 Acoustics - Guidelines for the measurement and assessment of exposure to noise in a working environment $360.00 via email in 1~3 business day superseded
GB/T 21230-2014 Acoustics―Determination of occupational noise exposure―Engineering method $550.00 via email in 1~5 business day valid
GB/T 21231-2007 Acoustics - Method for the measurement of airborne noise emitted by small air-moving devices $360.00 via email in 1~3 business day superseded
GB/T 21231.1-2018 Acoustics—Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices—Part 1: Airborne noise measurement $580.00 via email in 1~5 business day valid
GB/T 21231.2-2018 Acoustics—Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices—Part 2: Structure-borne vibration measurements $400.00 via email in 1~5 business day valid
GB/T 21232-2007 Acoustics - Guidelines for noise control in offices and workrooms by means of acoustical screens $250.00 via email in 1~3 business day valid
GB/T 22075-2008 HVDC converter station audible noise $780.00 via email in 1~5 business day valid
GB/T 22156-2008 Acoustics - Procedure for the comparison of noise-emission data for machinery and equipment $250.00 via email in 1~3 business day valid
GB/T 22157-2008 Acoustics - Specification of test tracks for the purpose of measuring noise emitted by road vehicles $330.00 via email in 1~3 business day abolished
GB/T 22157-2018 Acoustics—Specification of test tracks for measuring noise emitted by road vehicles and their tyres $670.00 via email in 1~5 business day valid
GB/T 22159.1-2012 Acoustics and vibration—Laboratory measurement of vibro-acoustic transfer properties of resilient elements—Part 1:Principles and guidelines $360.00 via email in 1~5 business day valid
GB/T 22159.2-2012 Acoustics and vibration—Laboratory measurement of vibro-acoustic transfer properties of resilient elements—Part 2:Direct method for determination of the dynamic stiffness of resilient supports for translatory motion $420.00 via email in 1~5 business day valid
GB/T 22159.3-2008 Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory motion $480.00 via email in 1~5 business day valid
GB/T 22159.4-2017 Acoustics and vibration-Laboratory measurement of vibro-acoustic transfer properties of resilient elements-Part 4:Dynamic stiffness of elements other than resilient supports for translatory motion $430.00 via email in 1~5 business day valid
GB/T 22159.5-2017 Acoustics and vibration-Laboratory measurement of vibro-acoustic transfer properties of resilient elements-Part 5:Driving point method for determination of the low-frequency transfer stiffness of resilient supports for translatory motion $370.00 via email in 1~5 business day valid
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