Cell phone jammers can block specific frequency bands

When the mobile phone signal jammer is working, if the transmission power is too large due to improper settings, in small confined spaces such as conference rooms and classrooms, electromagnetic waves will be superimposed in the narrow space and pass through the walls. originally separated from the outside world. Multiple reflections from the ceiling and floor can cause severe electromagnetic pollution to people in the room. According to the survey, the college entrance examination and the high school entrance examination are the occasions where mobile phone jammers are used the most. In some test rooms where cell phone signal jammers are used, some parties (gaokao invigilators, candidates and teachers) are emotional and unable to concentrate. Individual candidates even had headaches. There are various indications that if the transmission power of the mobile cell phone jammer is turned on too large, it will seriously affect the normal thinking of examinees in the examination room. As we all know, due to the free propagation of radio waves in the air, cell phone signal jammers can block the signals of mobile communication base stations in a specific area and achieve their limited purpose, but they will also endanger human health to varying degrees. Therefore, you must use cell phone signals with caution. shield.

The performance hall is a relatively large performance hall. If a low-power mobile phone jammer is used, there is likely to be an interference blind spot in the middle of the auditorium, which means that the middle position may not be shielded. At this time, it is necessary to use a medium-power mobile phone jammer, or even a high-power mobile phone jammer, to meet the requirements of interfering with the entire performance hall. If using a medium or high power cell phone jammer, how should it be installed? Usually, the walls around the performance hall are basically decorated with special decorations to reduce echoes. At this time, it is impossible to install mobile phone jammers on the walls of the performance hall. At this time, when there is a performance in the auditorium or theater, it is necessary to amplify and close the mobile phone signal of the theater, or remove the antenna of the mobile phone signal amplifier around the auditorium to ensure the interference effect of the mobile phone jammer. If the indoor signal distribution system of the theater is not turned off, it will seriously affect the interference effect.