Abstract: According to CNAS-GL007: 2020 “Guidelines for the Assessment of Uncertainty in Electrical Field”, the noise measurement uncertainty assessment program of household refrigerators is first introduced, and then the sources of noise measurement uncertainty are repeated measurement, sound level calibrator calibration, sound pressure level measurement of the measurement system, test environment (precision semi-silent chamber), envelope area and sample operating conditions. Next, the noise measurement uncertainty is calculated by analyzing these sources in combination with the actual case, in which the accuracy of the test equipment has a great influence on the uncertainty of the noise measurement of the household refrigerator.

Key words: Household refrigerators, Noise, Uncertainty