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  #41  
Old 14.12.2009, 19:59
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Re: Cell phone radiation [are mobiles hazardous to your health?]

That was about three years ago or so for the first time this issue has been raised but looking into simple Wikipedia up to date one can only agree that study is inconclusive.

The World Health Organization, based upon the consensus view of the scientific and medical communities, states that cancer is unlikely to be caused by cellular phones or their base stations and that reviews have found no convincing evidence for other health effects.[2][3] The WHO expects to make recommendations about mobile phones before the end of 2009.[4] Some national radiation advisory authorities[5] have recommended measures to minimize exposure to their citizens.

Although myself I tend to think like an engineer but sometimes I am prejudice and I feel better that way, so I keep my handy away from vital organs and my head... unless of course I'm arsed to answer my cellular, which is not very often.
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  #42  
Old 14.12.2009, 20:15
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Re: Cell phone radiation [are mobiles hazardous to your health?]



woo-hoo!!!!
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  #43  
Old 14.12.2009, 20:25
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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woo-hoo!!!!
did they show what is under the table?
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  #44  
Old 14.12.2009, 21:02
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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did they show what is under the table?
There could well be something under the table.

http://www.wired.com/underwire/2008/06/cellphones-cant/
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  #45  
Old 14.12.2009, 21:26
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Re: Cell phone radiation [are mobiles hazardous to your health?]

I thought I read in 20 min recently about a recent study saying mobiles were safe. I couldn't find the article on their website but from the linked articles 6 were saying they were dangerous and 4 were saying they were safe. So make of that what you want On the other hand you can get cancer from eating too much crisps and chips as well.....

I personally aren't too worried about the dangers but at the same time I turn my phone of at night
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  #46  
Old 15.12.2009, 11:34
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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Does it? Here I was thinking that the aerial must be tuned to the wavelength if you actually want to achieve proper effects, it's not being merely a "plug a clotheshanger into the hole" type affair.

Because if it is, people who operate actual radios cum headsets (say, for instance, pilots) with proper radiating power would mostly be dead by now (if of course RF frequency would actually a) travel through the headset cord and b) affect their brains. )

Maybe we ought to ask some phonemaker if the headset is actually plugging into the antenna module.
Yeah, it's a bit counterintuitive isn't it. The problem with wired headsets is that the earpiece/headphone cable is in such close proximity with the RF transmitter antenna in the phone that it actually picks up the signal, and in certain circumstances starts reradiating the signal. In other words it becomes a transmission antenna itself. In some cases the radiation can be as much or more than you would receive if you were simply holding the handset to your head due to the fact that the earpiece is effectively the tip of the induced antenna, and you've got it in your ear. The amount radiation you would receive depends on the electrical properties of the cable, which change as you move the cable. For instance turning your head could be the difference between getting the full amount of signal and nothing.

In a plane for instance the antenna is always located outside so given the distance and effective shielding of the planes hull there would be practically no signal, if any, induced in the headphone cable. Same goes for air traffic controllers, and pretty much anywhere else where radio is used and the operator has distance from the antenna.

Personally I'd always use a bluetooth headset as it generates far less radiation.
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Old 15.12.2009, 12:17
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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I thought I read in 20 min recently about a recent study saying mobiles were safe. I couldn't find the article on their website but from the linked articles 6 were saying they were dangerous and 4 were saying they were safe. So make of that what you want On the other hand you can get cancer from eating too much crisps and chips as well.....

I personally aren't too worried about the dangers but at the same time I turn my phone of at night
What doesnt kill you makes you stronger (or fatter)
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  #48  
Old 15.12.2009, 12:37
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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Yeah, it's a bit counterintuitive isn't it. The problem with wired headsets is that the earpiece/headphone cable is in such close proximity with the RF transmitter antenna in the phone that it actually picks up the signal, and in certain circumstances starts reradiating the signal.
I thought passive (inductive) reradiation implied the tuning of the inductor (i.e. using a capacitor) to the frequency of interest as well.
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  #49  
Old 15.12.2009, 14:11
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Re: Cell phone radiation [are mobiles hazardous to your health?]

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I thought passive (inductive) reradiation implied the tuning of the inductor (i.e. using a capacitor) to the frequency of interest as well.
Agreed, especially when you require the reradiator (or the parasitic element) to be as efficient as possible and/or to have specific properties. This is also why I stated that this can happen in certain circumstances. For instance coiling the cable to reduce the length and then placing it in the pocket with the phone could inadvertently alter the electrical characteristics of the cable to produce a relatively efficient reradiator. The problem for the user is that they will never know, as the radiation cannot be felt.

Studies on this appear to go from one end of the scale to the other, so again we're pretty much in the dark as to how much of a problem this is. However even with my basic A level physics from 20 years ago I can see how these wired headsets can potentially become a reradiator.

If wired solution is the only way to go then it would appear to me that the best choice would be a shielded headset, but to be honest the vast majority of people are simply going to use the one that came in the box, or buy the cheapest one available, and these are not likely to be shielded.
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