Gryz Krzysztof, Karpowicz Jolanta, Leszko Wiesław, Zradziński Patryk
Laboratory of Electromagnetic Hazards, Central Institute for Labour Protection - National Research Institute, Warszawa, Poland,
Int J Occup Med Environ Health. 2014 Dec;27(6):1043-54. doi: 10.2478/s13382-014-0334-0. Epub 2014 Dec 18.
The aim of the study was to identify and assess electromagnetic radiofrequency radiation (EMRR) exposure in a workplace located in a publicly accessible environment, and represented by offices (where exposure is caused by various transmitters of local fixed indoor and outdoor wireless communication systems).
The investigations were performed in 45 buildings (in urban and rural areas in various regions of Poland), using frequency-selective electric field strength (E-field) exposimeters sensitive to the EMRR with a frequency range of 88-2500 MHz, split into 12 sub-bands corresponding to the operating frequencies of typical EMRR sources. The variability of the E-field was analyzed for each frequency range and the total level of exposure by statistical parameters of recorded exposimetric profiles: minimum, maximum, median values and 25-75th - percentiles.
The main sources of exposure to EMRR are mobile phone base transceiver stations (BTS) and radio-television transmitters (RTV). The frequency composition in a particular office depends on the building's location. The E-field recorded in buildings in urban and rural areas from the outdoor BTS did not exceed respectively: medians - 0.19 and 0.05 V/m, 75th percentiles -0.25 and 0.09 V/m. In buildings equipped with the indoor BTS antennas the E-field did not exceed: medians - 1 V/m, 75th percentiles - 1.8 V/m. Whereas in urban and rural areas, the median and 75th percentile values of the E-field recorded in buildings located near the RTV (within 1 km) did not exceed: 1.5 and 3.8 V/m or 0.4 and 0.8 V/m, for radio FM band or for TV bands, respectively.
Investigations confirmed the practical applicability of the exposimetric measurements technique for evaluating parameters of worker's exposure in both frequency- and time-domain. The presented results show EMRR exposure of workers or general public in locations comparable to offices to be well below international limits.
本研究旨在识别和评估位于公众可进入环境中的工作场所的电磁射频辐射（EMRR）暴露情况，该工作场所由办公室代表（暴露由本地固定室内和室外无线通信系统的各种发射器引起）。
在波兰不同地区的45栋建筑物（城市和农村地区）中进行调查，使用对频率范围为88 - 2500 MHz的EMRR敏感的频率选择性电场强度（E场）暴露计，分为12个子频段，对应于典型EMRR源的工作频率。通过记录的暴露计曲线的统计参数分析每个频率范围的E场变化和总暴露水平：最小值、最大值、中值以及第25至75百分位数。
EMRR暴露的主要来源是移动电话基站收发信机（BTS）和广播电视发射机（RTV）。特定办公室中的频率组成取决于建筑物的位置。城市和农村地区建筑物中来自室外BTS记录的E场分别未超过：中值 - 0.19和0.05 V/m，第75百分位数 - 0.25和0.09 V/m。在配备室内BTS天线的建筑物中，E场未超过：中值 - 1 V/m，第75百分位数 - 1.8 V/m。而在城市和农村地区，位于RTV附近（1公里内）的建筑物中记录的E场中值和第75百分位数分别未超过：对于调频广播频段为1.5和3.8 V/m，对于电视频段为0.4和0.8 V/m。
调查证实了暴露计测量技术在评估工人在频域和时域暴露参数方面的实际适用性。所呈现的结果表明，在与办公室类似的场所，工人或公众的EMRR暴露远低于国际限值。
