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GB/T 19885-2005 Acoustics—Determination of sound insulation performance of cabins—Laboratory and in-situ measurements $180.00 via email in 1~3 business day valid
GB/T 19886-2005 Acoustics—Guidelines for noise control by enclosures and cabins $570.00 via email in 1~3 business day valid
GB/T 19887-2005 Acoustics. Measurement of the in situ sound attenuation of a removable screen $314.00 via email in 1~3 business day valid
GB/T 19888.1-2005 Acoustics—Stationary audible warning devices used outdoors—Part 1:Field measurements for determination of sound emission quantifies $220.00 via email in 1~3 business day valid
GB/T 19889.14-2010 Acoustics—Measurement of sound insulation in buildings and of building elements—Part 14:Guidelines for special situations in the field $420.00 via email in 1~3 business day superseded
GB/T 19889.2-2022 Acoustics—Measurement of sound insulation in buildings and of building elements—Part 2 : Determination and application of measurement uncertainties $345.00 via email in 1~5 business day valid
GB/T 19890-2005 Acoustics-High intensity focused ultrasound(HIFU)measurements of acoustic power and field characteristics $180.00 immediately valid
GB/T 20242-2006 Acoustics - Procedures for the measurements of real-ear acoustical characteristics of hearing aids $280.00 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 $210.00 via email in 1~3 business day valid
GB/T 20246-2006 Acoustics - Determination of sound power levels of multisource industrial plants for evaluation of sound pressure levels in the environment - Engineering method $150.00 via email in 1~3 business day valid
GB/T 20247-2006 Acoustics - Measurement of Sound Absorption in a Reverberation Room $200.00 immediately superseded
GB/T 20248-2006 Acoustics - Measurement of sound pressure levels in the interior of aircraft during flight $130.00 via email in 1~3 business day valid
GB/T 20249-2006 Acoustics - Definitions and measurement methods for the transmitted fields of focusing ultrasonic transducers $360.00 via email in 1~3 business day valid
GB/T 20430-2006 Acoustics―Noise control design procedures for open plant $280.00 via email in 1~3 business day valid
GB/T 20431-2006 Acoustics―Guidelines for noise control by silencers $604.00 via email in 1~3 business day valid
GB/T 20441.1-2010 Electroacoustics - Measurement microphones - Part 1: Specifications for laboratory standard microphones $160.00 via email in 1~3 business day valid
GB/T 20441.2-2018 Electroacoustics—Measurement microphones—Part 2:Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique $490.00 via email in 1~5 business day valid
GB/T 20441.3-2010 Electroacoustics - Measurement microphone - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique $280.00 via email in 1~3 business day valid
GB/T 20441.4-2006 Measurement microphones—Part 4: Specifications for working standard microphones $140.00 via email in 1~3 business day valid
GB/T 20441.5-2017 Electroacoustics--Measurement microphones--Part 5: Methods for pressure calibration of workingstandard microphones by comparison $250.00 via email in 1~3 business day valid
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