Can Cell Phone Block Dreams
Metal detectors are a very common instrument in schools. And the principle is simple, it is really not as tall as imagined, and even those with stronger hands-on ability can use the things bought in the hardware store to make one on site. Even Can Cell Phone Block Dreams , small signal jammers, are generally equipped in middle schools. Unless it is a large cell phone jammer with a monitoring telecommunication signal, this kind of equipment will only be allowed to be equipped with relevant qualified units. Generally speaking, military training bases or schools who want to apply for this kind of equipment should be able to apply for it. However, I am not a professional in the relevant industry, and only professionals know the specifics. The simplest example is the various national exams every year. If you look around, you can definitely find relevant such large-scale equipment! And the metal detectors you mentioned, small ones, are the ones held by the teacher at the door of the classroom. The last point is, it doesn't matter what your teacher says like this, military training is not something that needs to be kept secret, unless you are trained in a secret unit (generally impossible), you can take it and not be seen, who will take this kind of thing come to find your phone
Can Cell Phone Block Dreams It will not affect the human body. The working principle of the signal jammer is to scan from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. The scanning speed can cause garbled interference in the received message signal of the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station, so as to achieve the purpose of shielding the mobile phone signal. No service system, etc. The power of mobile phone signal jammers is generally not too large, basically tens of watts, and indoor use generally does not exceed 100W, and the amount of radiation is basically negligible. So it will not affect the human body.