Abstract:

Abstract:Objective Uncertainty is the range of measures in which the measured true value is measured, and it is a scientific description of the degree of uncertainty affected by the measurement error. This paper introduces the method of measuring uncertainty of noise measurement in laboratory animal housing facilities. Method Use AWA5636-2 sound level meter to measure the noise of different area and different number of samples. The location of the sample is set according to the requirements of GB 14925—2010, a total of 5 measurements, and the detection result is reported as the maximum value of the noise in the detection area. Result The expansion uncertainty under different detection requirements is 2. 6 dB ( A) . Conclusion The uncertainty of noise mainly stems from the maximum tolerance and the resolution of the sound level meter, and the sound level meter should be used according to the method prescribed by the sound level meter and the detection standard to reduce the measurement uncertainty of the detection results.