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The highest-quality research data available suggests that long-term exposure to microwaves from cellular phones may lead to an increased risk of brain tumors, reports a paper in the November/December issue of Journal of Computer Assisted Tomography.
Although debate continues, independent studies with long-term follow-up strongly suggest an increased risk of brain tumors related to the use of cellular or cordless phones.
"We conclude that the current standard of exposure to microwave during mobile phone use is not safe for long-term exposure and needs to be revised" conclude the study authors, led by R.B. Dubey of Apeejay College of Engineering, Sohna, Gurgaon, India.
Brain Tumor Risk May Double after 10 Years of Cell Phone Use
Think about all the young kids whose phones are literally glued to their heads.
In summary, most studies published so far have not found a link between cell phone use and the development of tumors. However, these studies have had some important limitations that make them unlikely to end the controversy about whether cell phone use affects cancer risk.
First, studies have not yet been able to follow people for very long periods of time. When tumors form after a known cancer-causing exposure, it usually takes decades for them to develop. Because cell phones have been in widespread use for less than 20 years in most countries, it is not possible to rule out future health effects that have not yet appeared.
Second, cell phone usage has been and is constantly changing. People are using cell phones much more than they were even 10 years ago, and the phones themselves are very different from what was used in the past. This makes it hard to know if the results of studies looking at cell phone use in years past would still apply today.
Third, the studies published so far have focused on adults, rather than children. Cell phone use is now widespread even among young children. It is possible that if there are health effects, they might be more pronounced in children because their nervous systems are still developing and their lifetime exposure will be greater than adults, who started at a later age.
Did you read my post right above yours where I talked about wireless headsets? That encompasses bluetooth, and but I didn't specify that because it's not the only wireless headset technology, and because there are multiple bluetooth specifications, but since you asked:
Originally posted by amongus
What about blue tooth use? I admit I'm not as educated in the differences in radiation levels between cellphones and BT tech.
Not sure which power level yours has? How far will it transmit? those guidelines should give you some idea. The risk level with the 100mW unit is 100 times greater than with the 1mW unit, if the risk is linearly related to power, which seems possible.
Bluetooth devices may have different RF power classification levels. The power versions for Bluetooth include; 1 mW - class 3, 2.5 mW - class 2, and 100 mWatts - class 1.
Devices that have an extremely low power level of 1 milliwatt have a very short range of approximately 1 meter. Bluetooth devices that have a power level of up to 100 milliwatts can provide a transmission range of approximately to 100 meters.
So, locate the base unit for your cordless phone where your head won't be right next to that antenna, as it could be almost as dangerous as a cordless phone.
One DECT cordless handset used by a typical household generates about 10 mW of time-averaged power, much less than a mobile phone operating at maximum power. Cordless handsets need less power than mobile phones because the signals do not have to travel as far to reach the base station – a few meters compared to up to a few kilometers. More power is required for radio communications over greater distances.
Cordless phone charger units are usually no more than a few tens of meters from the handsets. Mobile phone base stations can be kilometres from the mobile phone.
As communication is two-way, there is also the field from the cordless phone base station to consider. The maximum time-averaged power level for a DECT base station is the same as for a mobile phone handset – 250 mW. But the exposure is less because the cordless phone base station is not held to the head, and the field strength falls rapidly with distance.
Some national radiation advisory authorities, including those of Austria, France, Germany, and Sweden, have recommended measures to minimize exposure to their citizens. Examples of the recommendations are:
* Use hands-free to decrease the radiation to the head.
* Keep the mobile phone away from the body.
* Do not use telephone in a car without an external antenna.
The use of "hands-free" was not recommended by the British Consumers' Association in a statement in November 2000 as they believed that exposure was increased. However, measurements for the (then) UK Department of Trade and Industry and others for the French l’Agence française de sécurité sanitaire environnementale showed substantial reductions. In 2005 Professor Lawrie Challis and others said clipping a ferrite bead onto hands-free kits stops the radio waves travelling up the wire and into the head