Due to the precedent of communication equipment interruption in previous college entrance examinations in recent years, in order to completely eliminate such phenomena, signal jammers have been widely used.
So what are the obstacle principles used in the college entrance examination? In fact, this is equal to the time it takes for your phone to send and receive information. The phone jammer is like an oversized horn, the “noise signal” output is too large, and the phone cannot hear “mouth”. , Also known as a wifi jammer. In short, the job of the shield is far from blocking the phone signal, but blocking it. Equivalent to the use of electromagnetic signals useful in a large number of harmful signals.
Although telephones are used whenever wireless communication equipment is used, there are also invisible lines that serve as base stations for mobile phones. Mobile Phone The first step in making or receiving a call is to first establish a connection to a nearby mobile phone base station. If your left and right hands are a mobile phone and a left-handed phone calls a right-handed phone, the electromagnetic waves of the mobile phone will not be transmitted directly from the left hand to the right hand, but so simple, but it will be hundreds of meters from the phone to the left Roundabout.
This is why the signal in the examination room is disturbed. It severely disturbs the mobile phone users around the examination room, and the call quality becomes poor. For the flowers of the motherland, please support for a few days.
But is this mask really effective? The entire frequency range of electromagnetic waves is from the smallest Hz to the largest several hundred GHz, and the range is very large. Each segment can be used as a communication signal, but a few specialized general protective equipment are “skills are not big enough” and “five kinds” “Incomplete sound” shielding can only block a small number of band communication tools that can use band unshielded frequencies for communication.
Therefore, it is imperative to increase the number of jammers, and try to keep covering all areas, so that it will let….