Back in the late 70's I was one of a group of project manager working on an 800 MHz public safety radio system. The radios were belt mounted with the normal coiled cord to the microphone/speaker that was clipped to the officers epaulets as you normally see nowadays. The radio antenna was part of the microphone/receiver assembly.
The radios were something like 3 watt and it was found that there was excessive radiation to the users head. The radios were then limited to 1 watt and it was still found to have excessive radiation.
At that point the antenna were moved back to the radio unit itself and that satisfied everyone.
Now it's 30+ years latter and I'm still hearing about his issue but it's cell phone. Antenna propagation has not completely changed over the years so why is this an issue.
Thirty years ago we were worried that radiation from the antenna would fry somebodies brain like a hot dog and all we've done is take the frequency and push it more towards a microwave oven and stick it next to the brain and wonder/
said by JustDSL The radios were something like 3 watt and it was found that there was excessive radiation to the users head. The radios were then limited to 1 watt and it was still found to have excessive radiation.
Can you provide details of the study?
FYI I tend to agree given the radiation is non ionizing.
As much as I like my cell phone, I can't help but think this is an issue. I don't feel any different when expose to my phone's radiation so i'm not sensitive to it in the least, but i don't doubt that there are some who are.
If there is evidence that the radiation causes harm, apart from the those who are super sensitive to it, I doubt that the industry will admit to it simply because of how lucrative the mobile market has become. Instead they will play the semantics game as mentioned in the article "treating the ear as an extremity", really? I mean, how far is your ear from your head, or brain for that matter.
They will say that "X" amount of watts is hazardous but "x" amount is safe, but is "x" amount really safe if you're going to be subjected to it for the rest of life since the cell phone is not going away anytime soon?
Like I said, I'm all geeked out myself with gadgets, and have been using a cell phone for about 20 years, but I can't help but think that we're sleeping with the enemy on this one. At the end of the day the people get what the people wants. They want a solid connection and that comes with a price and when the Galaxy S4 & iPhone6 hit the shelves radiation exposure will be the least researched spec that people look for. -- Good judgement comes with experience...Experience comes after bad judgements
Sensitive? This has only become an issue with more and more Wifi networks being built and people that don't want towers in their "back yards".
The World Health Org has stated as well that this is NOT an issue anywhere in the world and is BS. They've conducted the study and the FCC shouldn't be spending money on crap as this since there is no proof yet, all kinds of studies that say this "being sensitive" is BS. But I bet this same people that are crying about it- could live next to a Tree Tower and wouldn't even complain if they didn't know the tree had a cell tower mounted in it.
At the end of the day the people get what the people wants. They want a solid connection and that comes with a price and when the Galaxy S4 & iPhone6 hit the shelves radiation exposure will be the least researched spec that people look for.
Below is a list of the top ten most popular phones and their corresponding SAR ratings.
As a matter of course, I generally use a BT headset while on my cell. It mitigates a lot of the concerns and risks that may be present, and is far more comfortable to use. Of course, it's far easier to complain than actually doing something about it.
I also use a microwave oven, but I don't stand next to the thing while in use either. -- "I fear the day that technology will surpass our human interaction. The world will have a generation of idiots." ~ Albert Einstein
How still put the phone to their head? Most people text now or do other things that don't require the phone being next to you head. Regardless this whole thing is BS. Your head get more radiation from the sun on a daily basis than you do a cell phone.
So you're simultaneously roasting your nuts (handset) and bluetoothing your brain?
LOL, I was just about to post what you both said. Many people are like I don't put the phone to my head because of RF poisoning (if there is such a thing) and then they go on to say they use a wireless Bluetooth headset. I just shake my head and keep walking, lol. That's like saying I hate smokers and I don't smoke myself, but every person in my house does. It negates the original purpose schmucks! LOL!
5TH -- "The relationship between what we see and what we know is never settled..."
The planet itself emits lots of different kinds of waves and/or frequencies, humans would adapt regardless so meh.
Also, people would gain hearing loss first, if said issue is real, but a LOT of people would gain hearing loss from using headphones and playing loud music before something like a cell phone would ruin your hearing (since you make calls like what? A few times a day, while someone listening to music may listen with a headphone or loud speaker for hours?)...
I saw a T-shirt about 5 years ago a guy in a band was wearing, it said:
"The Hippies were right"
Indeed, I remember a time back before many people were concerned with things like global warming, organic foods, and environmental sustainability that most people were laughing at the hippies as mostly nutjobs.
Even if you don't believe they were right they were certainly closer to correct than most people gave them credit for.
It is likely due to other things (maybe even better detection) but I think cancer rates are generally rising. Low power wireless communication might be harmless but there is no reason not to limit exposure where we can.
I think the Specific Absorption Rate (SAR) for cordless phones (0.01 and 0.05 W/kg) is generally much lower than cell phones (0.171 to 1.370 W/Kg). Partly because cell phones transmit over a much greater distance and partly because they contain a lot more electronics.
People have this impression that only cell towers are capable of any real radiation but you forget your cell phone must transmit with enough power to reach that same tower in the other direction and you store it a few inches from your junk and occasionally hold it against your temple.
Thanks for replying to my tease. And to Prototype5 for supplying relative SAR values. That's a huge spread.
The wholesale dismissive postures from industry versus 'feelings' arguments from the anti crowd make me flippant, I suppose. Of course it's prudent to reduce exposure where one easily can. After reading a bit more on Bluetooth I'll likely adopt your practice.
I try to use the 'Best Practices' principle in that I reduce unnecessary exposure to potentially harmful things. I mean hell, we have sunblock for the sun, right? People don't seem to be adverse to that.
Lot's of things we've been told are safe, later turn out to be the opposite. So, I just do what I can for myself using a bit of sense. -- "I fear the day that technology will surpass our human interaction. The world will have a generation of idiots." ~ Albert Einstein