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GB/T 21231.1-2018 Acoustics—Measurement of airborne noise emitted andstructure-borne vibration induced by small air-moving devices—Part 1:Airborne noise measurement (USD) via email in 1-5 business day VALID
GB/T 34834-2017 (USD) via email in 1-5 business day VALID
GB/T 17248.5-2018 Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions applying accurate environmental corrections (USD) via email in 1-5 business day VALID
GB/T 4854.6-2014 Acoustics—Reference zero for the calibration of audiometric equipment—Part 6:Reference hearing threshold levels for test signals of short duration (USD) via email in 1-3 business day VALID
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 (USD) via email in 1-5 business day VALID
JJG 1019-2007 Verification Regulation of Working Standard Microphones (Coupler Comparison Method) (USD) via email in 1-3 business day VALID
GB/T 14368-1993 Acoustics-STANDARD ultrasonic power source via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 32524.2-2016 via email in VALID please email coc@codeofchina.com for quotation
GB/T 15508-1995 Acoustics-Speech articulation testing method via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
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 (USD) via email in 1-3 business day VALID
GB/T 16296.3-2017 Acoustics—Audiometric test methods—Part 3:Speech audiometry (USD) via email in 1-5 business day VALID
GB/T 21230-2014 Acoustics—Determination of occupational noise exposure—Engineering method (USD) via email in 1-5 business day VALID
GB/T 31013-2014 Acoustics—Acoustic insulation for pipes,valves and flanges (USD) via email in 1-5 business day VALID
GB/T 4129-2003 Acoustics--Requirements for the performance and calibration o reference sound sources used for determination of sound power levels via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 6881.2-2017 (USD) via email in 1-5 business day VALID
GB/T 37274-2018 (USD) via email in 1-3 business day VALID
JJF 1223-2009 Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio) (USD) 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 (USD) via email in 1-8 business day VALID
JJF 1142-2006 Calibration Specification for Building Acoustic (USD) via email in 1-3 business day VALID
JJF 1228-2009 Calibration Specification for Sound Power Meters (USD) via email in 1-3 business day VALID
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