If you were exposed to an electromagnetic field, what would happen?
Exposure to electromagnetic fields is not a new phenomenon. However, in the 20th century, the increasing demand for electricity, rapidly developing new technologies, and changes in social patterns have created more and more sources of artificial electromagnetic fields, and the exposure to artificial electromagnetic fields in the environment continues to increase. From the generation and transmission of electricity, household appliances, industrial equipment to telecommunications and broadcasting, whether at home or at work, everyone is exposed to a complex mixture of weak electric and magnetic fields. This EMF detector is a portable healthand safety field detector, which can detect AC magnetic field, electric field and high-frequency (RF) radiation. It is mainly used to detect and evaluate the impact on human body of non-ionizing electromagnetic field , magnetic field and high-frequency radiation in living and working environment.
Even in the absence of an external electric field, there is still a very weak electrical current generated by chemical reactions as part of normal bodily functions in our body. For example, nerves transmit signals in the form of electrical pulses; Most biochemical reactions, including digestion and brain activity, are accompanied by the rearrangement of charged particles. The electrical activity of the heart is also very active, and doctors can use electrocardiograms to record them.
Low frequency electric fields can affect the human body like other substances composed of charged particles. When an electric field acts on conductive materials, it affects the distribution of surface charges. An electric field will cause current to flow from the body to the earth.
Low frequency magnetic fields can induce circulating currents in the human body. The strength of the current depends on the strength of the external magnetic field. If the current is large enough, it will stimulate the nerves and muscles of the human body, or affect other physiological processes.
Both electric and magnetic fields can induce voltage and current in the human body, but even when standing directly below a high-voltage wire, the induced current in the body is still very small compared to the limit value that can cause electric shock or other electrical effects.
Heating is the main physiological function of radio frequency electromagnetic fields. In microwaves, this fact is used to heat food. The intensity of the radio frequency electromagnetic field that people are usually exposed to is much lower than the intensity that can produce a significant heating effect. The heating effect of radio frequency electromagnetic waves is currently the main basis for formulating safety guidelines. Scientists are also studying the possibility of long-term exposure producing effects below the critical value that can heat the human body. So far, the negative health effects of low-intensity long-term exposure to radio frequency and power frequency electromagnetic fields have not been confirmed, but scientists are actively further studying this field.
