Important admissions exams, qualifying exams or final exams require the installation of testing room cell phone signal jammers to block electronic signals around the testing room and prevent possible electronic cheating.
So, how much area can the cell phone blocker in the exam room shield? Can only one jammer in an exam room achieve the purpose of shielding? How many jammers should a teaching building use?
First of all, we need to know: the mobile phone signal jammer in the examination room has a theoretical shielding range, which is about a radius of 0-20 meters. But please note that this is a theoretical distance. The actual effect depends on the local signal strength, especially whether there is a signal base station nearby. If there is a signal base station within 200 meters, the shielding effect will be reduced.
In addition, walls can also weaken the shielding effect of the shield. The shielding effect is also weakened due to the stronger signal near the window.
The standard classrooms of schools are generally about 75 square meters, and each classroom can be equipped with a shielding device to achieve better results. It can be placed in the middle of the classroom for maximum shielding. Of course, this should be determined in conjunction with the power wiring. It is also common to place shields at the podium.
If it is a larger classroom or there is a base station nearby, you can place two jammers in each classroom, one at the front and one at the front. Due to the enhanced superposition of shielded signals, a better effect of 1+1>2 will be achieved.
In addition, in order to ensure the shielding effect, another shielding device can be arranged every 10-20 meters in the corridor of the teaching building.
Finally, it should be noted that the installation height of the shield is preferably 1.5-2 meters above the ground.