Wifi power levels compared to mobile phones.
Hi all, i have been reading about health and safety concerns about wireless networks, and also i wanted to compare them to mobile phone networks.
And before anyone says we have covered this many times here, i am approaching this from a different angle.
Mobile phone facts :-
Most phone masts transmit around 50 to 100 watts of power per transmitter, that is the white can shaped drum that you see typically.
Most mobile phones transmit around 1 watt of power, and some 3g,4g phones can peak around 2w of power.
( please note though this is next to the head )
if you measure the power at ground level from a mobile phone mast ( single transmitter- i.e 1 white drum ) the power at 50m from a 10m high mast will be around 100mW ( remember that figure , one tenth of a watt)
Phone masts do not transmit in even directions, most of their signal is angled downwards toward where users would be, and if you were in an hot air ballon passing over the signal would be weaker than if you were below the mast.
Wireless access point facts:-
the maximum allowed power output of a wireless access point in europe is
100mw ( one tenth of a watt)
the signal strength of wireless access points can vary in different areas of the surroundings depending upon model design and aerials attached etc.
Both phone masts, and wireless access points , and the power they transmit are subject to laws of physics, i.e they are subject to the inverse square law, which is basically flux density decreases proportionally the further you get from the device omitting it.
SO WHAT AM I ON ABOUT you might well ask ??
well the point i am making is that sitting next to a wireless access pont is the same as sitting 50 m away from a mobile phone mast. i.e same power levels (but if your mobile phone mast has multiple transmitters this power reading will be higher )
Although different carrier frequencies may be used depending upon age of equipment etc. most newer wireless access points use the same frequency as your domestic microwave. also the lower frequency used by mobile phones can penetrate into the human body easier than the higher WiFi frequency. So does that mean Wifi is safer , or do we just need a larger dose to produce a noticeable boilogical effect ?
Now scientists tell us that the levels when you are further away from WiFi are so low that they must be safe , but they cannot prove they are, although tests have been done on animals etc.( but can an animal tell you it has a headache? or feeling of unwell ?)
There seems to be lots if scientific bodies studying this and giving various findings, but after looking at them, i am suprised that there has never been a full epedimiological study of the occurances of cancer with proximity to mobile phone masts. some authorities/organisations/groups have done though, see below :-
Now if you notice the distances from tranmitters that incidents occur you can see that they are much greater than 50 m, and a reading of 100mW .
Plus if you take into account the ruduction of power due to building penetration the power levels must be much lower. But what are these levels?, are they the same as being a few metres away from a wireless access point i wonder?? And then you have to think about the wireless transmitter in the device/laptop you are using, because that tranmits too !
i think until we can see a map similar to the one above showing occurances of cancer in proximity to transmitters for the whole country, we will never get more research done. Are these incidents ocuuring purely because those areas are heavily populated, and these are just normal but tragic outcomes of life.?
but the one thing i would urge you to find out is what distance would the parents of the children in your school allow a mobile phone mast to be placed ?
before you go and flood everywhere with WiFi, as a report into this may well be on the horizon.
p.s i have spent ages looking on the net for info, and reading boring documents etc, and my conclusions are, whilst a little poison over a long time can do the same as a large dose, a low noise level over a few days does not make you deaf !
But why are the outputs of WiFi limited to 100 mW ??? the questions just keep coming really .........
hope this is of use , and please note, i am not frightened of being wrong, as the truth is only your findings to the best of you abilities :-)