Wearable metal objects with high electromagnetic reflection characteristics can cause interference with the incident waves during exposure to the electromagnetic (EM) radiation. Therefore, it is of interest to investigate the effect of metal objects capable of increasing the absorption of EM energy and temperature within the tissues when get exposed to EM radiation. A numerical analysis of increase in specific absorption rate (SAR) and temperature distribution in a human head model when metal objects are placed between the head and radiating source is performed. A realistic three-dimensional heterogeneous human head model, metal objects of different shapes and sizes, and spectacles with different lenses are used. A half-wavelength dipole antenna operating at 1800 MHz served as an EM radiation source. Results show that the presence of metal objects in proximity to the head alters SAR and temperature increase within the tissues. In most cases, metal objects redistribute the EM field incident upon them to a smaller region increasing power absorption, thereby increasing SAR and temperature in that region. The power absorption in head layers is found to be sensitive to metal object's size and shape, and distance of the antenna from the objects.

具有高电磁反射特性的可穿戴金属物体在暴露于电磁（EM）辐射期间可能会干扰入射波。因此，感兴趣的是研究当暴露于EM辐射时能够增加EM能量吸收和组织内温度的金属物体的作用。当将金属物体放在头部和辐射源之间时，对人体模型中的比吸收率（SAR）和温度分布的增加进行了数值分析。使用了逼真的三维异质人头模型，不同形状和大小的金属物体以及带有不同镜片的眼镜。工作在1800 MHz的半波长偶极天线用作EM辐射源。结果表明，靠近头部的金属物体的存在会改变SAR和组织内温度的升高。在大多数情况下，金属物体会将入射到其上的电磁场重新分布到较小的区域，从而增加功率吸收，从而增加该区域的SAR和温度。发现头层的功率吸收对金属物体的大小和形状以及天线与物体的距离敏感。