In this study, we measured and analyzed the spectral characteristics of a low‐frequency magnetic field (MF) inside several gasoline‐powered cars while driving on busy city roads. The spectra obtained upon measurements in the interior of the cars are compared with those measured in office locations at different times of the day and with different disturbances of the geomagnetic field (k ‐index of disturbance 2–8). The power spectral density of the electromagnetic field in cars moving on busy roads in the frequency range of 10⁻³–10² Hz is one to three orders of magnitude higher than that in urban offices. This raises a question regarding the possible influence of these MFs on the psychophysiological state of drivers. In turn, in the daytime, the MF power in the range from 10⁻³ to 1 Hz inside the locations is three times higher compared with the power of a strong geomagnetic storm. Despite such an overwhelming magnetic background, geomagnetic storms affect various organisms. The nonspecific effect of magnetic storms is supposed to be associated with relatively long (lasting several hours or more [frequency range of 10⁻⁴−10⁻⁵ Hz]) periods of enhancement or weakening of the local geomagnetic field. In this range, especially at night, the power spectral density of geomagnetic disturbances is comparable to and can even exceed the power density of urban MFs. © 2020 Bioelectromagnetics Society.

中文翻译：

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汽车和办公室场所中的低频磁场以及地磁场变化。

在这项研究中，我们测量并分析了在繁忙的城市道路上行驶时，几辆汽油动力汽车内的低频磁场（MF）的频谱特性。将在汽车内部进行测量获得的光谱与在一天中的不同时间以及在不同地磁场干扰（干扰的k指数2-8）下在办公室位置测量的光谱进行比较。10 ^-3 –10 ²频率范围内繁忙道路上行驶的汽车中电磁场的功率谱密度 Hz比城市办公室高1到3个数量级。这引起了关于这些MF对驾驶员的心理生理状态的可能影响的问题。反过来，在白天，地点内部的10 ^-3至1 Hz范围内的MF功率是强地磁风暴的功率的三倍。尽管有如此强大的磁性背景，但地磁风暴仍影响着各种生物。电磁风暴的非特定影响被认为与相对较长的时间（持续数小时或更长时间[频率范围10 ^-4 -10 ^-5 Hz]）增强或减弱局部地磁场的周期。在此范围内，特别是在晚上，地磁干扰的功率谱密度可与甚至可超过城市MF的功率密度。©2020生物电磁学会。