Establishment and protection of mobile phone signal shielding system in campus examination room

"On June 25th, the Qinyang Municipal People's Congress held a meeting at the city hall. The members of the Municipal People's Congress listened to the "Report on 2017 Work Plan for Establishment and Protection of Mobile Phone Signal blocker System in Campus Examination Room" and discussed it. The opinions are as follows:

First, students should be educated to obey examination discipline and abide by exam rules. Examinations must be fair and transparent, and we will never allow any cheating behavior.

Second, strengthen technical support for examinations and improve signal shielding system construction in examination rooms.

Thirdly, we should strengthen law enforcement supervision to create a fair competitive environment for candidates."

First of all, mobile phone signals are composed of electromagnetic waves. Mobile phone signals mainly contain large frequency components, so they can be shielded by metallic containers. The shielding material is metal, which can absorb the signal energy emitted by the electromagnetic wave, so that the energy gradually weakens until it disappears.

The shielding effect of metallic containers is not very good at low frequencies (less than 30Hz), but it is better at higher frequencies (more than 30Hz). For example, when you put your phone in a metal box like this one:

Section:Electromagnetic radiation can cause electronic damage around high-voltage lines, but the shielding effect is not very good. It is difficult to shield electromagnetic waves below 300 megahertz. Electromagnetic waves at higher frequencies are easier to block.

The shielding effect of the electromagnetic wave shielding system is related to its frequency.

The frequency offset refers to the change of frequency caused by portable cell phone jammer interference and the change of test time.

The lower the frequency, the greater its shielding effect, but also more difficult to achieve high-frequency shielding.

Electromagnetic waves at higher frequencies are easier to block than lower ones (in this case).

There are several causes of frequency offset, as follows:

The first is the interference of the mobile phone jammer and the change of test time. Mobile phones can generate strong electromagnetic radiation, which has a great influence on other electronic devices. In addition to causing interference with other electronic products, mobile phones also have an impact on people's bodies. They can cause headaches and dizziness in some people who use them for a long time or frequently use them while sleeping at night. Therefore, when taking exams in class or at home, students should turn off their cell phones before testing (or turn off all Wi-Fi signals).

Before using a mobile phone jammer, you must pay attention to its strength, whether it is allowed by local laws and regulations

Before you use a mobile phone jammer, it is necessary to pay attention to its strength. The stronger the mobile phone jammer is, the more powerful its blocking ability will be. Therefore, when purchasing a mobile phone jammer, you should check whether your country has any laws and regulations that prohibit you from using a mobile phone jammer. Please note that if you purchase an illegal product online or offline in China without any knowledge of these laws and regulations firstly, we won't be responsible for any losses caused by this action after delivery!

In addition to checking whether your country allows people like yourself (who are not related employees or workers) to use such products legally or not at all times every day throughout every month year round without interruption by law enforcement agencies such as police departments; You also need pay attention when deciding whether what kind of product would suit best with your purpose because different types have different strengths based on their frequency range capabilities; If there's no problem regarding legality then just think carefully about what kind would work best before making purchase decision so that it works well later on with minimal effort possible needed afterwards."

The significance of the mobile phone jammer is that it can prevent cheating in examinations, which can ensure the fairness and justice of examinations. However, we must not use mobile phone jammers blindly. We must make sure that we have used them correctly and under the guidance of laws and regulations.