What is an SAR Value?

What is an SAR Value?

SAR is a measure of the rate of RF (radio frequency) absorption by the body from a source of radiation, such as cell phone.

In theory, SAR provides a standardized measurement of the RF exposure characteristics of cell phones to ensure that they are within the safety guidelines set by the FCC (Federal Communications Commission).

To test cell phones for SAR compliance, a cell phone is utilized while operating at it`s highest power level through all frequency bands in which it operates. The cell phone is precisely placed in various “specific” positions against a dummy head and body, to simulate the way different users typically hold a cell phone, such as against the side of the head.

Despite the guidelines set forth by the FCC for the SAR value standard, it is reported that SAR value does not provide sufficient information about the scope of RF exposure under typical usage conditions. Cell phones cannot be reliably compared for their overall exposure characteristics on the basis of a single SAR value, as SAR measurements vary as the amount of RF exposure varies under typical cell phone usage conditions. The SAR values collected by the FCC are to only ensure that the cell phone does not exceed the FCC`s maximum permissible exposure levels when operating in conditions which result in the device`s highest possible but not it`s typical RF energy absorption for a user. SAR does not indicate the amount of RF exposure a consumer will experience during typical use of their cell phone.

Considering the variables of individual cell phone use, SAR may be not be a reliable comparison of RF exposure to consumers. Several medical and biological studies have reported that adverse health effects could occur as a result of cell phone usage.

Cell phone users who are concerned with the reliability of this standard and who would like to reduce their exposures to radiation, are recommended to implement all methods of protection available.