Kaune W T, Forsythe W C
Bioelectromagnetics. 1985;6(1):13-32. doi: 10.1002/bem.2250060103.
This paper gives current densities measured in homogeneous grounded human models exposed to vertical, 60-Hz electric fields. The methods used for these measurements were validated by measuring the current densities induced in a grounded hemisphere and in a grounded prolate hemispheroid; agreement between measurement and theory was good. For an unperturbed field strength of 10 kV/m, current densities measured in the human chest were in the range 125-300 nA/cm2. A strong horizontal current-density enhancement was observed in the axillae, with peak values of about 400 nA/cm2. The vertical current density in the arms, when held downward, was in the opposite direction to that in the chest. Current densities in the abdomen, pelvis, and legs were a strong function of whether the body was grounded through one or both feet. With one foot grounded, the horizontal current density in the lower pelvic region, just above the crotch, was 770 nA/cm2. This value was the largest of those measured in the head, arms, or torso of the human model. Scaling factors derived from these data and similar data for animals will provide a quantitative basis for comparing animal and human exposure to 60-Hz electric fields. In addition, current-density data given in this paper can be directly extrapolated to higher frequencies, at least to 1 MHz. These extrapolated data may be useful to individuals and groups involved in the determination of safety standards for the lower radiofrequency region.
本文给出了在暴露于垂直60赫兹电场的均匀接地人体模型中测得的电流密度。通过测量接地半球体和接地长椭球体中感应的电流密度，验证了用于这些测量的方法；测量值与理论值吻合良好。对于10 kV/m的未受干扰场强，在人体胸部测得的电流密度范围为125 - 300 nA/cm²。在腋窝处观察到强烈的水平电流密度增强，峰值约为400 nA/cm²。当手臂向下垂时，手臂中的垂直电流密度方向与胸部相反。腹部、骨盆和腿部的电流密度强烈取决于身体是通过一只脚还是两只脚接地。单脚接地时，在胯部上方的下盆腔区域的水平电流密度为770 nA/cm²。该值是在人体模型的头部、手臂或躯干中测得的最大值。从这些数据以及动物的类似数据得出的比例因子，将为比较动物和人类暴露于60赫兹电场的情况提供定量依据。此外，本文给出的电流密度数据可直接外推到更高频率，至少到1 MHz。这些外推数据可能对参与确定较低射频区域安全标准的个人和团体有用。
