Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques
|Publication Date:||14 June 2013|
To specify protocols for the measurement of the peak spatial-average SAR in a simplified model of the head of users of handheld radio transceivers used for personal wireless communications services and intended to be operated while held next to the ear. It applies to contemporary and future devices with the same operational characteristics as contemporary devices that operate in the 300 MHz to 6 GHz frequency range and provides a conservative estimate1 of the peak spatial-average SAR representative of that which would be expected to occur in the heads of a significant majority of persons during normal use2 of these devices, but which may not be the absolute maximum value that could possibly occur under every conceivable combination of head size, head shape, handset orientation, and spacing relative to the head.
The purpose of this recommended practice is to provide a protocol for the measurement of the peak spatialaverage SAR in an anatomical model of the human head of users of wireless handsets intended to be operated while held next to the ear. It provides the users with standardized and accepted protocols, measurement and validation techniques, and the means for estimating the overall uncertainty in order to produce valid and repeatable data. Specific SAR limit values are not included since these are found in other documents, e.g., the latest published versions of IEEE Std C95.1™ and the International Commission on Non-Ionizing Radiation Protection (ICNIRP) Guidelines.3
1 As used in this recommended practice, conservative means that the measured value will not be less than the expected value during normal use by a majority of users―it does not mean that the measured value will not be less than the absolute maximum SAR value that could possibly occur under every conceivable combination of head size, head shape, handset orientation, and spacing relative to the head.
2 The difference between normal use and intended use is described in the NOTE of the definition of intended use in Clause 3.
3 Information on references can be found in Clause 2.