Tomitsch J, Dechant E
Lower Austrian Landesakademie-European Center for Environmental Medicine, A-3100 St Pölten, Austria.
Radiat Prot Dosimetry. 2012 May;149(4):384-91. doi: 10.1093/rpd/ncr325. Epub 2011 Aug 8.
After measuring extremely low frequency electric and magnetic fields (ELF-EFs, ELF-MFs) and radio frequency electromagnetic fields (RF-EMFs) in 2006, a follow-up investigation was done in 2009. Overall, 130 measurements in bedrooms at identical and 83 at changed locations within the same or a neighbouring building were performed. The median of ELF-EFs decreased from 25.15 to 17.35 V m(-1) from 2006 to 2009. The median of all-night ELF-MFs from power supply decreased from 16.86 to 12.76 nT, whereas the arithmetic mean was almost unchanged (+0.1%). No difference in the medians of all-night ELF-MFs of railway current was observed. RF-EMFs increased from 41.35 to 59.56 µW m(-2). Increases primarily occurred in the frequency ranges of Global System for Mobile 900 MHz, Universal Mobile Telecommunications System and Wireless Local Area Network. Television changeover from analogue to digital resulted in a reduction within the Ultra-high Frequency-band from 0.47 to 0.35 µW m(-2). The base stations of the recently established terrestrial trunked radio system caused a median of 0.05 µW m(-2).
2006年对极低频电场和磁场（ELF-EFs、ELF-MFs）以及射频电磁场（RF-EMFs）进行测量后，于2009年开展了一项后续调查。总体而言，在同一建筑物或相邻建筑物内相同位置的卧室进行了130次测量，在变化位置进行了83次测量。2006年至2009年，ELF-EFs的中位数从25.15 V m(-1)降至17.35 V m(-1)。来自电源的全夜ELF-MFs中位数从16.86 nT降至12.76 nT，而算术平均值几乎未变（增加0.1%）。未观察到铁路电流全夜ELF-MFs中位数的差异。RF-EMFs从41.35 µW m(-2)增至59.56 µW m(-2)。增加主要发生在全球移动通信系统900 MHz、通用移动通信系统和无线局域网的频率范围内。电视从模拟转换为数字导致超高频频段内的值从0.47 µW m(-2)降至0.35 µW m(-2)。最近建立的陆地集群无线电系统基站产生的中位数为0.05 µW m(-2)。
