Heinrich Hannah
SEMFIRA, Thurner Str 82, Hausen, Germany.
Health Phys. 2007 Jun;92(6):541-6. doi: 10.1097/01.HP.0000262628.29600.b4.
The correct assessment of non-sinusoidal, pulsed, or intermittent exposure to low frequency electric and magnetic fields already is a key issue in the occupational environment while becoming more and more important in the domain of the general public. The method presented provides a simple and safe solution for the assessment of arbitrary field types--including sinusoidal and continuous-wave signals--with frequencies up to several 100 kHz and has already proven its practicability and usefulness for more than 5 years. The concept is based on fundamental laws of physics and electrostimulation and well-established physiological data. It allows for a seamless and easy integration in any standard or guideline dealing with human safety in electric, magnetic, and electromagnetic fields. A very simple-to-use graphical version allows an easy and fast assessment of the exposure to non-sinusoidal, pulsed, or intermittent low-frequency magnetic fields without introducing a large overestimation of the exposure situation. A computer-based version makes a much more detailed signal analysis possible and can provide useful information for exposure reduction using modifications of the magnetic field's time parameters (e.g., rise/fall times).
对非正弦、脉冲或间歇性低频电场和磁场的正确评估，在职业环境中已是一个关键问题，而在普通公众领域也变得越来越重要。所提出的方法为评估频率高达几百千赫兹的任意场型（包括正弦和连续波信号）提供了一种简单且安全的解决方案，并且已经在超过5年的时间里证明了其实用性和有效性。该概念基于物理和电刺激的基本定律以及完善的生理数据。它能够无缝且轻松地整合到任何涉及电场、磁场和电磁场中人类安全的标准或指南中。一个非常易于使用的图形版本允许轻松快速地评估对非正弦、脉冲或间歇性低频磁场的暴露情况，而不会对暴露情况造成大幅高估。基于计算机的版本使更详细的信号分析成为可能，并且可以通过修改磁场的时间参数（例如上升/下降时间）为减少暴露提供有用信息。
