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GB/T 16407-2006 Acoustics - Characteristics and measurements of field of Pressurepulse lithotripters 260.0 via email in 1~3 business day valid
GB/T 18699.2-2002 Acoustics - Determination of sound insulation performances of enclosures - Part 2: Measurements in situ (for acceptance and verification purposes) 240.0 via email in 1~3 business day valid
JJG 991-2004 Verification Regulation of Aural Impedance Audiometers 300.0 via email in 1~3 business day superseded
GB/T 16404.2-1999 Acoustics—Determination of sound power levels of noise sources using sound intensity—Part 2:Measurement by scanning 270.0 via email in 1~3 business day valid
GB/T 4854.7-1999 Acoustics-Reference zero for the calibration of audiometric equipment-Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions 195.0 via email in 1~3 business day abolished
GB/T 18022-2000 Acoustics - Methods for measuring the longitudinal sound speed and attenuation coefficient of rubbers and plastics in the frequency range 1 MHz to 10 MHz 150.0 via email in 1~3 business day valid
GB/T 1988 7-2005 GB/T 1988 7-2005 Acoustics - Measurement of the in situ sound attenuation of a removable screen 165.0 via email in 1~3 business day valid
GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane 360.0 via email in 1~5 business day superseded
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
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 240.0 via email in 1 business day abolished
GB/T 1988 4-2005 GB/T 1988 4-2005 Acoustics - 150.0 via email in 1~3 business day valid
GB/T 7341.3-1998 - Part 3: Auditory test signals of short duration for audiometric and neuro-otological purposes 110.0 via email in 1~3 business day valid
GB/T 21232-2007 Acoustics - Guidelines for noise control in offices and workrooms by means of acoustical screens 250.0 via email in 1~3 business day valid
GB/T 18696.1-2004 Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 1:Method using standing wave ratio 210.0 via email in 1~3 business day valid
GB/T 19885-2005 Acoustics—Determination of sound insulation performance of cabins—Laboratory and in-situ measurements 170.0 via email in 1~3 business day valid
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 285.0 via email in 1~3 business day valid
GB/T 16404-1996 Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points 300.0 via email in 1~3 business day valid
GB/T 20243.1-2006 Acoustics—Measurement of the influence of road surface on traffic onise Part 1:Statistical Pass-By method 210.0 via email in 1~3 business day valid
GB/T 20431-2006 Acoustics―Guidelines for noise control by silencers 90.0 via email in 1~3 business day valid
GB/T 6881.2-2002 Acoustics--Determination of sound power levels of noise sources--Enginerring methods for small,movable sources in reverberant field--Part 1:Comparison method for hard-walled test room 200.0 via email in 1~3 business day superseded
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