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See Chinese contents: GB/T 2888-2008 GB/T 2888-2008: Methods of noise measurement for fans blowers compressors and roots blowers
This Standard specifies the noise measuring methods of the A-sound-level and sound pressure level. And it also specifies the noise measuring methods of the sound power level. This Standard applies to noise measurement for fans, turbo-blowers, turbo-compressors and Roots blowers.
