SAR

Choosing a smartphone, and then we focus on its technical and cost characteristics. And hardly anyone pays attention to the fact, what level of radiation has a particular model. World found some harmless modern smartphones.

Radiation level of mobile devices are usually denoted acronym SAR. SAR (Specific Absorption Rate) – is the specific absorption coefficient of the human body of electromagnetic radiation emitted by mobile phone. SAR is the unit of measurement of watts / kilogram. To mobile phone received a certificate of conformity of an organization, depending on the country of production, it must meet certain standards. In the U.S., certification by Federal Communications Commission and Communications (FCC), in Canada this procedure by the Ministry of Industry (IC). These countries have adopted the norm value up to 1.6 W / kg per 1 gram of tissue mass. In countries outside the European Union, the rate of SAR is 2 W / kg, but the calculation is made on 10 grams of tissue.

lowest level of radiation

Typically, parameter SAR neglected. Shops and online sites in the description of a particular model indicate all options except this one. And all because of that finding, what level of SAR, is not so simple. So, if the models of Samsung and Nokia easier (their SAR can be found on the official website or through the technical support service), other manufacturers specify this option only in the manual, which is issued when buying a smartphone. Having dealt with the fact that a SAR, as it is measured, and that affects its level, we wanted to find out which one on the market today is the apparatus `harmless` and compiled a rating.

The first hand-held cell phone was demonstrated by John F. Mitchell and Dr. Martin Cooper of Motorola in 1973, using a handset weighing around 4.4 pounds (2 kg). In 1983, the DynaTAC 8000x was the first to be commercially available. From 1983 to 2014, worldwide mobile phone subscriptions grew from zero to over 7 billion, penetrating 100% of the global population and reaching the bottom of the economic pyramid. In 2014, the top cell phone manufacturers were Samsung, Nokia, Apple, and LG and Sony.