Will the use of Wi-Fi and cell phone jammers in exam rooms and schools endanger the health of cell phones and people?
Whether college students should pass all courses has always been a matter of debate. All universities now encourage students to pass all courses and eventually earn a bachelor's degree. Completion of each course is a prerequisite for a bachelor's degree. If they fail, the student will not receive a certificate, which means that the time spent studying for the degree will be wasted. Of course, the final result will affect your career.
As you know, it is not uncommon for students to use their mobile phones to cheat during exams. This situation has plagued teachers and students alike. They know that some students cheat to pass the exam because they do not listen carefully in class.
In China, cell phone jammers are standard equipment in the examination room: when the cell phone is locked in the task list, the signal transmission and reception function of the cell phone can be turned off within the scope of the rules, calls cannot be made, so as to achieve the purpose of "forced stop". Not only exams, but also postgraduate examinations, civil service examinations and various qualification examinations require cell phone blockers to prevent applicants from communicating with the outside world through wireless signals. When using large electronic WiFi and cell phone jammers in the test room, various cell phone signals (2G, 3G, 4G, 5G signals), wireless intercom signals, Bluetooth WiFi signals, etc. will be interfered with by the jammer.
Some people refuse to use jammers because they don't understand signal jammers. Will they ask cell phone jammers to damage phones? Will using cell phone jammers cause radiation and harm to the body? This is a good question, before answering this question, we must understand the principle of radio communication: within a certain frequency range, the mobile phone and the base station are connected by wireless electromagnetic waves, supplemented by a certain transmission speed and a certain modulation method to transmit data and sound. Cell phone jammers, on the other hand, send out jamming signals at the opposite frequency to that of mobile phones. It will only cause the audio signal received by the mobile phone to appear distorted, the mobile phone cannot recognize the normal data sent by the base station, and the mobile phone cannot connect with the base station. The mobile phone appears to be searching for the network, no signal, no service system, etc., so the mobile phone will not be damaged!
The test data shows that after the cell phone jammer is turned on, the mobile phone cannot communicate with the external electromagnetic waves. So the phone has lost the signal. The strength of the electromagnetic signal emitted by the cell phone jammer is very weak, and the strength of this signal is still far from causing harm to the human body. At the same time, the cell phone signal shield only shields the cell phone signal, so that the cell phone cannot communicate with the base station, so the cell phone itself will not be damaged.
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