Test Standard for Noise Value of Air Compressor

Common standards for noise testing of air compressor

the noise generated during the operation of air compressor is an important evaluation object of industrial environmental noise control. The current mainstream air compressor noise test basis includes China’s national standardsGB/T 4980and international standardsISO 3744. GB/T 4980 “Measurement of noise of positive displacement compressor” stipulates the method of measuring sound power level in engineering environment, which is applicable to fixed and mobile air compressor; ISO 3744 precision sound pressure method is adopted to measure sound power level in semi-anechoic chamber or free field environment, with higher precision.

Key parameters: Sound power level (L_WA)

the core index of air compressor noise detection issound power level(Unit: dB(A)), it reflects the overall sound production ability of the equipment, is not affected by the test distance and environmental reflection, and is convenient for horizontal comparison under different working conditions. Compared with the sound pressure level, the sound power level has more engineering consistency and regulatory applicability.

Key points of noise detection

• before testing, ensure that the air compressor is in stable running state under rated working conditions.
• The arrangement of measuring points should conform to the envelope surface specified in the standard (such as hexahedron or semi-spherical surface)
• the background noise must be at least 10 lower than the measured noise. dB(A), otherwise, it needs to be corrected
• recommended IEC 61672-1 first-class precision sound level meter and calibrator

standard developmentair compressor noise testit is not only the basis for meeting the requirements of environmental protection supervision, but also the key basis for optimizing equipment selection and noise reduction design.