摘要
目的了解深圳市职业病防治机构声级计的准确度,为提高工作场所噪声测量质量控制提供依据。方法于2017年11月,采用GLQC-202型多频点声校准器对深圳市9家区级职业病防治机构的声级计进行仪器性能实验室间比对,依据JJG 188—2017 《声级计》、 GB/T 27043—2012 《合格评定能力验证的通用要求》等对频率计权、级线性和模拟工作场所噪声源测量结果进行评价。结果共有18台声级计进行性能比对且均在检定合格有效周期内。频率计权测量结果满意率为64.7%,不满意结果集中在4 000和8 000 Hz高频率段;级线性测量结果满意率为88.4%,不满意结果集中在4 000 Hz倍频程中心频率的104和124 dB两个声信号;模拟工作场所噪声源现场定点测量结果显示,实验室间Z比分数(ZB)和实验室内Z比分数(ZW)满意率分别为94.4%和83.3%,离群率均为5.6%。结论检定合格有效周期内的声级计测量准确度仍可能出现偏差,偏差主要出现在4 000和8 000 Hz高频率段。
Objective To learn the accuracy of sound level meters among occupational diseases prevention institutes in Shenzhen and to provide basis for noise measurement and control. Methods In November 2017, the inter-laboratory comparisons between the sound level meters performance results of 9 district-level occupational diseases prevention institutes in Shenzhen were conducted using GLQC-202 multi-frequency point acoustic calibrator,the allowable deviation of the frequency-weighted measurements,the linear level measurements and the simulated on-site noise sources at fixed locations in workplaces were evaluated according to JJG 188-201 and GB/T 27043-2012. Results Eighteen sound level meters were included and were certified within the validated period. The satisfaction rate for frequency-weighted measurement results was 64.7%,and the unsatisfactory results mainly lay in the two high-frequency bands of 4 000 and 8 000 Hz. The satisfaction rate for linear level measurement results was 88.4%,and the unsatisfactory results lay in the two acoustic signals of 104 and 124 dB of the 4 000 Hz octave center frequency band. The satisfaction rates of inter-laboratory Z-score（ZB）and intra-laboratory Z-score（ZW）were 94.4% and 83.3% respectively,and the outlier rates both were 5.6%. Conclusion Although the sound level meters tested were within their valid certification periods,the accuracy of measurement results may still be biased,which mainly lay in the two high-frequency bands of 4 000 and 8 000 Hz.
作者
周伟
丘海丽
田东超
杨光涛
王雪毓
左弘
ZHOU Wei;QIU Hai-li;TIAN Dong-chao;YANG Guang-tao;WANG Xue-yu;ZUO Hong(Department of Occupational Hazard Assessment,Shenzhen Prevention and Treatment Center for Occupational Diseases,Shenzhen,Guangdong 518020,China)
出处
《预防医学》
2018年第12期1217-1221,共5页
CHINA PREVENTIVE MEDICINE JOURNAL
关键词
噪声
声级计
准确度
实验室间比对
Noise
Sound level meters
Accuracy
Inter-laboratory comparisons
