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GB/T 22157-2018 Acoustics—Specification of test tracks for measuring noise emitted by road vehicles and their tyres 700.0 via email in business day to be valid
GB 4854-1984 75.0 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for the measurement and assessment of exposure to noise in a working environment 360.0 via email in 1~3 business day superseded
JJG 185-1997 Verification Regulation of Measuring Hydrophone in the Frequency Range 500Hz to 1 MHz 225.0 via email in 1~3 business day abolished
JJG 2017-2005 Verification Scheme of Measuring Instruments for Underwater Sound Pressure 120.0 via email in 1~3 business day valid
GB/T 7341.4-1998 - Part 4: Equipment for extended high-frequency audiometry 110.0 via email in 1~3 business day valid
JJG 639-1998 Verification Regulation of Ultrasonic Source for Medical Ultrasonic Diagnostic Equipment 285.0 via email in 1~3 business day valid
GB/T 16539-1996 Acoustics-Determination of sound power levels of noise sources using vibration velocity-Measurement for seal machinery 225.0 via email in 1~3 business day valid
JJG 893-1995 Ultrasonic Source for Doppler Fetel Heart Beat Detector 90.0 via email in 1~3 business day abolished
GB/T 20242-2006 Acoustics - Procedures for the measurements of real-ear acoustical characteristics of hearing aids 285.0 via email in 1~3 business day valid
GB/T 31004.3-2014 Acoustics―Measurement of sound insulation in buildings and of building elements using sound intensity―Part 3:Laboratory measurements at low frequencies 240.0 via email in 1~3 business day valid
JJG (船舶) 5-1991 Verification Methods for Free Field Reciprocity Method of Standard Hydrophone Spherical Wave via email in business day valid
GB/T 4128-1995 Acoustics-STANDARD hydrophone 120.0 via email in 1~3 business day valid
GB/T 5111-1995 Acoustics-Measurement of noise emitted by railbound vehicles 90.0 via email in 1~3 business day abolished
JJG (电子) 15004-1988 XFC-2 Type Standard Signal Generator (Trial Implementation) 135.0 via email in 1~3 business day valid
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 930.0 via email in 1~10 business day valid
JJG 199-1996 Vdrification Regulation of Tone Burst Generators 105.0 via email in 1~3 business day valid
JJF 1281-1990 O.T.N. of the Primary Standard for Audiometric Zero Level of Bone Conduction 30.0 via email in 1~3 business day valid
GB/T 17248.3-1999 Acoustics - Noise emitted by machinery and equipment - Measurement of emission sound pressure levels at a work station and at other specified positions - Survey method in situ 255.0 via email in 1~3 business day valid
GB/T 18696.2-2002 Acoustics - Determinatio of sound absorption coefficient and impedance in impedance tubes - Part 2: Transfer function method 300.0 via email in 1~3 business day valid
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