GB/T 2888-2008 Translated English of Chinese Standard. (GBT 2888-2008, GB/T2888-2008, GBT2888-2008): Methods of noise measurement for fans blowers compressors and roots blowershttps://www.chinesestandard.net, 7 oct. 2014 - 40 pages 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. |
Table des matières
| 3 | |
Scope | 5 |
Measurement items | 8 |
Measuring instruments equipment rack and its requirements | 9 |
Measuring procedure | 10 |
Processing of measurement data | 20 |
Measurement reports | 22 |
Annex A | 24 |
Annex B | 33 |
Expressions et termes fréquents
A-sound-level or frequency-band aerodynamic performance test anechoic chamber assumed sound source average A-sound-level background noise carrying out performance centrifugal compressors dB(A decibels dB Dual-suction enclosure environmental correction value fans and Roots Figure A.3 Figure B.1 Flow m3/min free inlet free outlet free sound field frequency-band sound pressure GB/T inlet and free inlet and outlet inlet and pipeline location of measuring measure the air measured values Measuring device Measuring method measuring Pipeline measuring the noise measuring the sound motor kW motor noise motor-direct Figure noise measurement operating conditions outlet connection pipeline outlet of fans Pipeline for measuring pipeline inlet pipeline outlet Power of motor Pressure kPa radius Roots blowers shown in Figure sound field method sound level meter sound power level sound pressure level sound source surface sources of fans specified speed r/min Power square meter m2 stagnation pressures standard length supplementary measuring points test of pipeline transfer area unit