Monday, July 5, 2010

SAR and your Mobile Phone

Radio wave exposure and Specific Absorption Rate (SAR) information.

Nowadays mobile telephone manufacturers have taken the SAR issue into their design consideration. The SAR requirements are based on scientific guidelines that include safety of all persons, regardless of age and health.

The radio wave exposure guidelines employ a unit of measurement know as the Specific Absorption Rate or SAR. Tests for SAR are conducted using standardized methods with the phone transmitting at its highest certified power level in all used frequency bands.

While there may be differences between the SAR levels of various phone models, they are all designed to meet the relevant guidelines for exposure to radio waves.

SAR data information for residents in countries that have adopted the SAR limit recommended by International Commission of Non-Ionizing Radiation Protection (ICNIRP), which is 2 W/kg averaged over ten (10) gram of tissue (for example European Union, Japan, Brazil and New Zealand).

Some mobile phone models available in Singapore do meet the above-mentioned standard at around 1.5 W/kg (10g).


Focus for the Family said...

Seow Boon wrote:
Thanks, Hew Lee, for thought provoking article.
After a quick “googling”, here are some questions that still trouble me:

The tests are performed on a standardized “phantom” head, i.e. a dummy. What are the individual variations from the dummy head’s specifications?
I suspect that these can be large and not insignificant.

How about children (who seem to be fascinated by mobile phones)? Clearly, their skulls are thinner. Also, the water content of their brain tissues is higher.
What about ethnic variations? On anecdotal evidence, there are ethnic differences in skull thickness.

Any comments?
The tests are for transmit mode, when the radiation is highest. So, it pays to be a good listener!

Focus for the Family said...

Hewlee wrote:
There are two main factors that can contribute to the health dangers caused by electromagnetic pollution.

These are:
a) The “talk” duration on the mobile phone. When we talk, our mobile phone is transmitting the message to the service provider’s network. Like SB says, “it pays to be a good listener!”
b) The transmitter power of the mobile phone. The higher it is, the wider is the network coverage. But it must not exceed the SAR level recommended by the International Commission for Non-Ionizing Radiation Protection (ICNIRP).

So the bottom line is …
Get a set that falls within the recommended SAR level and don’t talk until your mobile phone battery turns you off.

You can visit the following web sites to obtain more information on this topic and also check what SAR level your mobile phone is emitting.

more info:

Radiation Chart: