Electromagnetic People Killer.Mobile Phone.
The mobile phones, called also cellular phones, are an integrating part of modern telecommunications, which offer the possibility of maintaining the continual communication without affecting the movement liberty.In many countries, more than half of the population uses mobile phones and the market develops fast.The prognosis shows that in 2009 will be, in the entire world, 1,9 bilion of surscribers of the mobile telephony services.Because of this reason it was necessary the installation of an increased number of basis station.The basis stations are radio antennas of low power that communicate with the users apparatus.At the beginning of 2000, they were about 2000 basis stations functioning in Great Britain and about 82.000 locations destined to the cellular telephony in the United States, each location including one or more basis stations.
On the pollution effects due to the mobile telephones were made numerous studies, the results of recent studies regarding the effects of the exposure to the electromagnetic fields of radio frequency (RF) on human beings are supplied by the World Health Organization, the Royal Society of Canada and by a committee of experts in Great Britain.
The RF fields get in the tissues exposed to depths that depend on frequency – until 1 cm at the frequencies used by mobile phones.The RF energy is absorbed in the body and produces tissues heating which is dispersed normally through the thermo adjustment mechanism of the body.All the proved effects of the exposure to RF are clearly connected to the heating.While the RF energy can interact with alive tissues at low levels to produce a significant heating, none of the studies did not put into evidence the unwanted effects on health at exposure levels under the authorized limits through international directives.
More studies on animals exposed to the RF fields similar to these emitted by the mobile phones have not found any proof that RF produce or favor brain tumors.While a study made in 1997 revealed the increase of the rate at which the lymphomas were developed at the mice genetically modified, the implications of this result on health are still ambiguous.Nowadays there are running more studies to confirm this observation and to determine any revelance to human cancer.Three epidemologic recent studies have not found any convincing proof of the increase of cancer risk or any other disease along with the use of the mobile phones.
Electromagnetic Influence on Human Body
Usually, when it is followed the electromagnetic field influence on technical systems, it is used the concept of electromagnetic compatibility.When it is followed the effect on man’s health and are composed maps of the electromagnetic perturbations (disturbances), accomplained by epidemiologic studies, it is used the concept of the electromagnetic pollution.
The study of the electromagnetic field affects on the hunam beings was made from the beginning of electrical engineering.A first document, written in 1893 approacjes the intensity of the electromagnetic interactions with the environment, including human beings and animals.The biological system interact with the electromagnetic field in direct dependence of the field frequency.
There are:
- interactions at low frequencies (50Hz – 100 Hz), in the case of the fields generated by the distribution network, touring cars, industrial equipments;
-interactions at high frequencies (100Hz – 1GHz), in the case of the fields generated by the radio stations in all the wavelengths, television, mobile telephony, radiotelephony;
-interactions in the microwaves domain (over 1GHz), as in the case of microwave bake house, radars.
The more affected persons are the military personal who works with radars and the medical personal that works with diathermy equipments.
It is hard to make a correct analysis of the exposure effects.For example, a study made on the mobile phone effects shows a death rate higher at the users of this equipment.But how much of this effect is owed to the electromagnetic field and how much to the stress associated to the persons that use the mobile phone is hard to appreciate.
The sources which can have an impact over the man’s health:hair dryer to children, TV, PC, walkie talkie, broadcast towers, electric heaters, ship telecommunication systems, high voltage networks.
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