In recent years, mobile communications have developed rapidly, and the number of mobile phone users has increased dramatically. This has promoted economic and technological development and social progress, but on the other hand, the noise pollution caused by mobile phones has also become more and more serious. Cell phone signal jammers and blocking tools are increasingly used.
In public places such as conference rooms, courts, prisons, theaters, libraries, classrooms and examination rooms, the random use of mobile phones destroys the quiet and serious atmosphere and affects the normal conduct of corresponding activities.
As another example, the use of mobile phones to leak secrets is becoming a problem that cannot be ignored in political, economic, and military life. Especially in important meeting places, offices of government agencies where information is highly confidential, securities, financial management and trading centers and other departments, it often happens that someone intentionally leaks information or pass unintentionally.
Mobile phones leak important secrets, causing significant political impact or economic losses. Such incidents emerge one after another and have attracted close attention from relevant departments.
In addition, using mobile phones or other mobile communication devices to detonate bombs, destroy important military and civilian targets, and carry out targeted or unpurposed assassinations has become a common method used by terrorists, hostile forces, and criminals. This type of sabotage is extremely covert and extremely accurate, which brings great difficulties to my security and defense work.
On the other hand, with the rapid popularization of mobile phones, people are also enveloped in high-intensity radio frequency radiation magnetic fields. This kind of radiation poses an increasing threat to the safety of gas stations, gas filling stations, chemical warehouses and other areas. For this reason, Australia, Germany, the United Kingdom, the United States, Canada and other countries have successively issued laws banning the use of mobile phones in the above areas.