背景修正对噪声监测结果影响的探讨与实践

Discussion and Practice of Influence on Noise Measurement Result by Background Correction

分析了背景噪声测量不确定性以及背景修正对噪声监测结果的影响,提出,在实际噪声测量工作中,当测量值与背景值的差值≥3 dB且测量值修正结果与排放限值非常接近时,以及当测量值与背景值的差值<3 dB且测量值与排放限值的差值≤4 dB时,对背景噪声进行重复测量,计算背景噪声测量不确定性,利用公式法进行定量背景修正的建议,并在噪声测量和数据处理过程中降低背景噪声测量不确定性,从而减少背景修正对噪声测量结果的影响,更加客观地反映噪声的真实情况。

The current work analyzed the uncertainty of background noise measurement and the effect of background correction on the noise measurement result.Also it suggests that during the course of noise measurement,the background noise be measured repeatedly to calculate the measurement uncertainty of background noise,and the formula method be adopted to correct the background of quantitation,when the difference value of measured value and background value is not less than 3 dB and the corrected measurement value is very close to the controlled value,and when the difference value of measured value and background value is less than 3 dB and the difference value of measured value and the controlled value is not larger than 4 dB,to measure the background noise.The uncertainty of background noise measurement should be reduced in noise measurement and data process,in order to reduce the influence of background correction on the result of noise measurement and to objectively reflect the fact of noise.