Detailed explanation of research on public electromagnetic radiation and protection
Will the electromagnetic radiation from mobile phones and base stations harm human health? The public is very concerned about this, and domestic media is filled with various expert suggestions. In fact, developed countries and international organizations have conducted years of research on this topic, and the conclusion is that the electromagnetic radiation from mobile phones and base stations is not related to diseases such as brain tumors and leukemia. The electromagnetic radiation in daily life is not harmful to human health, which is a consensus in the scientific community. Why is the public afraid of electromagnetic radiation? There are two main misconceptions: firstly, the difference between ionizing radiation and electromagnetic radiation is confused. High intensity ionizing radiation such as X-rays can indeed break the chemical bonds of human tissues, causing harm to the human body, while the intensity of electromagnetic radiation is very low and does not cause the same harm; The second concern is about the non thermal effects of electromagnetic radiation. Electromagnetic radiation does indeed have thermal effects, and the electromagnetic furnace utilizes thermal effects. However, rigorous scientific experiments do not support the non thermal effects of electromagnetic radiation, and the scientific community does not support the claim of changing human DNA or killing sperm and other non thermal effects. The World Health Organization and other international authoritative institutions only recognize the potential hazards of electromagnetic radiation thermal effects. Various countries and international organizations have established limit standards for public electromagnetic radiation. Although the specific values are not the same, the measurement methods and numerical units are unified. There are two universal measurement standards, namely power density standard and specific absorption rate standard.
Power density standard
Power density refers to the radiation power received per unit area, which measures signal strength and can be represented by electric field strength and magnetic field strength, but power density is more commonly used. The following figure shows the regulations on public exposure limits in the current national standard "Electromagnetic Environment Control Limits" (GB8702-2014) in China. The frequencies of mobile phones and base stations fall within the range of 30MHz to 30000MHz.
