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Standards GB - Chinese national standards - Page 159
Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
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GB/T 12060.16-2017
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Sound system equipment—Part 16: Objective rating of speech intelligibility by speech transmission index
Standard published on 1.11.2017
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GB/T 12060.2-2011
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Sound system equipment - Part 2: Explanation of general terms and calculation methods
Standard published on 31.10.2011
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GB/T 12060.21-2025
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Sound system equipment—Part 21: Acoustical (output-based) measurements
Standard published on 30.5.2025
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GB/T 12060.3-2011
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Sound system equipment - Part 3: Methods of measurement on audio amplifiers
Standard published on 31.10.2011
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GB/T 12060.4-2012
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Sound system equipment - Part 4: Methods of measurement for microphones
Standard published on 31.12.2012
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GB/T 12060.5-2011
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Sound system equipment - Part 5: Methods of measurement for main characteristics of loudspeakers
Standard published on 31.10.2011
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GB/T 12060.7-2013
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Sound system equipment—Part 7Methods of measurement on headphones and earphones
Standard published on 31.12.2013
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GB/T 12060.9-2011
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Sound system equipment - Part 9: Methods of measurement for artificial reverberation, time delay and frequency shift equipment
Standard published on 30.12.2011
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GB 12073-1989
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Security and sanitary standard for dairy equipment
Standard published on 29.12.1989
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GB/T 12078-2012
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General specification for X-ray tubes
Standard published on 5.11.2012
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