Thursday, August 5, 2010

It has been reported that 1/3rd of Sweden population is electrosenitive.

I have attached a file Int-Rad-Limit-GSM1800.ppt, which gives details of the limit adopted by various countries. In India, we have adopted ICNIRP guidelines of 1998 of f/200, where f is in MHz. So, at 1840 MHz, it comes out to be 9.2W/sq.m, whereas Russia has adopted 20mW/sq.m and some European countries have even adopted 1mW/sq. m., which is 100's and 1000's of times less that what we have adopted.

Are people from these countries ignorant?

It has been reported that 1/3rd of Sweden population is electrosenitive. Sweden was the first country to announce 100% mobile connectivity and now their citizens are paying the price. Recently, nearly 100 researchers in USA have demanded that USA must adopt stricted norms (1/100th to 1/1000th) as is being adopted in European countries, please see the following link

Bio-initiative report (610 pages long) also supports that stricter radiation norms must be adopted. Recent, Interphone study also mentions that excessive use of mobile phones causes cancer. However, the
most strange thing is that they have taken average user as a person who uses cell phone for 2 hours/month (In India, many people use 2 hours in 1 or 2 days).

For mobile phones, max. SAR value of 1.6W/Kg is termed safe. However, this limit is only for 6 minutes/day. It has a safety magin of 3 to 4.

Why this information is not being made public?

Let's do some simple calculation of how much microwave power will be absorbed by human body if exposed to the so called safe radiation level adopted in India, which is f/200, where f is in MHz. So, at 900 MHz, power density is 4.5W/sq meter.

Power recd. by human body (modeled as cylinder of height - 5'6" and waist 34" = 1.5 sq meter approx.) will be 6.75 Watts.

In one hour, microwave energy absorbed will be 6.75 x 3600 = 24.3 KW-sec

In one day, microwave energy absorbed will be 24.3 x 24 = 583.2 KW-sec

A typical microwave oven has rating of 700 to 1000 W, and with say 60% efficiency, microwave power output is say 500 W. This implies that human body can be safely kept in a microwave oven for 1166 secs
= 19 min. per day. Ofcourse, people can argue about body being adaptable to external threats and this is spread over whole day, and so on.

However, question remains, would we like to put our citizen in an open microwave oven for 19 min./day over the years.

I am willing to come and have open discussions with telecom operators, policy makers and users.

With regards.


Girish Kumar

Professor, Electrical Engineering Department

I.I.T. Bombay, Powai, Mumbai - 400076, INDIA

Tel. - (022) 2576 7436, Fax - (022) 2572 3707



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