As communication tools, mobile phones and PHS have closer contact with us. At present, many people in cities buy PHS phones after owning mobile phones, and the "dual-phone clan" is quietly becoming a trend in the city. The reason, in addition to low tariffs, is also related to PHS's inherent advantage of low radiation. So, how green is PHS?
The radiation is lower than that of the remote control
The Chinese government is extremely responsible in terms of electromagnetic radiation environmental protection. Our country’s current electromagnetic radiation protection standards are much stricter than those in European and American industrialized countries. . According to relevant test reports, the maximum radiation frequency of PHS mobile phones is 10 milliwatts, which is much smaller than the power used by the TV remote control (25 milliwatts) and can be completely ignored.
In addition, PHS does not emit power when it is in a dormant state during standby, which means that the PHS mobile phone does not radiate at this time, and is only interactive when a call is processed from the sleep state to the calling state. emission. The transmission power of the PHS mobile phone is calculated based on the distance of 1 cm from the human body when the PHS mobile phone is used. The electromagnetic radiation of the PHS mobile phone is only 0.25 microwatts/cm2 and is absorbed by the human body. The electromagnetic radiation power of PHS mobile phones is only 1/150 of my country's microwave health standards.
No interference to the device
If you buy a PHS, you can do two small experiments: use a landline to make calls, and at the same time let friends or family members dial PHS around you. You will find that there will be no noise on the phone; you can also turn on the radio while dialing PHS, and there will be no noise on the radio. The above experiments show that in addition to being basically harmless to the human body, PHS will not cause interference to electronic instruments and equipment.
As we all know, medical equipment is most afraid of electromagnetic wave interference. Now many hospitals have PHS base stations, and many medical staff can carry PHS. In Xiaotangshan Hospital's battle against SARS last year, the communication between doctors, directors, and medical staff, as well as the information communication between wards, isolation areas, and work areas were all accomplished through PHS. It is reported that at that time, more than 1,300 medical staff used PHS wireless local calls to communicate with colleagues in the hospital, society, and family members at work, and the call results were good. It can be said that PHS played the most important role in the fight against SARS.
You can rest assured that it will be accompanied by a base station
Similar to a mobile phone, when a "PHS" receives a signal, it also needs a transmitting base station. At present, more than 30 provinces and cities across the country have opened PHS, with nearly 40 million users. Some PHS base stations are located in residential areas, and some are even hung on the walls of residential buildings. For this reason, many people are worried about being harmed by electromagnetic radiation. According to the information we have, this worry is actually completely unnecessary.
Communication experts said that the coverage area of ??a PHS base station is within 300 meters of the base station as the center. In a community, the base stations will not be installed too densely. The power of a base station is only 500 milliwatts, while the power of a microwave oven can reach 700 watts. In addition, relevant departments specifically monitored the radiation of PHS base stations. The test results showed that: in normal working conditions, the environmental electromagnetic field strength 5 meters away from the PHS base station transmitting antenna is only 1/1000 of the relevant national standards. Therefore, the majority of residents do not need to be confused when talking about "base stations", and can rest assured that they will be accompanied by base stations.
In summary, PHS is a model of green and environmentally friendly communication equipment. It can effectively protect the physical and mental health of users without causing interference to home appliances. The frequent use of PHS in the city will be of great benefit in preventing various diseases caused by electromagnetic wave radiation.
Landline phones have no radiation and do not receive signals.