Whether the use of mobile phones (MP) represents a health hazard is still under debate. As part of the attempts to resolve this uncertainty, there has been an extensive characterization of the electromagnetic fields MP emit and receive. While the radiofrequencies (RF) have been studied exhaustively, the static magnetic fields (SMF) have received much less attention, regardless of the fact there is a wealth of evidence demonstrating their biological effects. We performed 2D maps of the SMF at several distances from the screen of 5 MP (models between 2013 and 2018) using a tri-axis magnetometer. We built a mathematical model to fit our measurements, extrapolated them down to the phones’ screen, and calculated the SMF on the skin of a 3D head model, showing that exposure is in the µT to mT range. Our literature survey prompts the need of further research not only on the biological effects of SMF and their gradients, but also on their combination with extremely low frequency (ELF) and RF fields. The study of combined fields (SMF, ELF, and RF) as similar as possible to the ones that occur in reality should provide a more sensible assessment of potential risks.

使用移动电话 (MP) 是否代表健康危害仍在争论中。作为解决这种不确定性的尝试的一部分，对 MP 发射和接收的电磁场进行了广泛的表征。尽管已经对射频 (RF) 进行了详尽的研究，但静磁场 (SMF) 受到的关注却少得多，尽管有大量证据证明其生物效应。我们使用三轴磁力计在距 5 MP 屏幕（2013 年和 2018 年之间的型号）几个距离处执行 SMF 的 2D 地图。我们建立了一个数学模型来拟合我们的测量结果，将它们外推到手机屏幕，并计算 3D 头部模型皮肤上的 SMF，显示曝光在 µT 到 mT 范围内。我们的文献调查提示需要进一步研究 SMF 及其梯度的生物效应，以及它们与极低频 (ELF) 和 RF 场的组合。对组合场（SMF、ELF 和 RF）的研究应尽可能与现实中发生的场相似，从而对潜在风险进行更明智的评估。