At the test site, a wifi jammer with the ability to block signals was used as a tool to prevent cheating. However, there is a saying that "jammer equipment is harmful to the human body", which lacks scientific basis. WiFi blockers are an effective way to prevent cheating. According to the Ministry of Education, we will announce how to use this product. There are various opinions on this situation.
To address this, we interviewed Mr. Chen, who has six years of experience in the production and sale of signal jammers. "I touch this machine every day, no problem." This device was introduced in many movies. In theory, commonly used signal interception equipment emits only a small amount of electromagnetic waves and does not affect the human body. In the United States and Europe, legislation on human body electromagnetic wave protection standards and standardization of electromagnetic wave measurement methods is steadily developing.
The occlusion range of this product may vary with the distance of the mobile phone base station. When the base station is far away, the effective range increases, and when the base station is close, the effective range decreases. The effective range is related to the distance and attenuation caused by obstacles on the way. This type of signal interception equipment is mainly used in hospitals, test rooms, conference rooms and other places where mobile phones are not allowed.