https://www.lessemf.com/
Regards
V
I was wondering if anyone had experience or insights into electromagnetic shielding a home or a room?
Any suggestions as to reading also appreciated.
With best wishes,
AP.
https://www.lessemf.com/
Regards
V
We have just completed an EMC test facility at work. How much money do you have to spend?
What are you trying to achieve?
Tinfoil hats would be much cheaper
Why?
The most pernicious sources of EMI in your home will be... er... in your home... Potentially dozens of devices - even LED light bulbs. So what's being protected from what?
Thanks for the responses.
Vertex, I'd not seen that; thank you.
Scottbombedout and Earlofsodbury, there is a mobile phone mast nearby and quite a lot of wifi. In addition, much of the building is glass.
The intention is to reduce such exposure. This is also advised by my medical doctor.
As to how much to spent, I think it more of reducing exposure perhaps by screening the bedroom in particular and cost effective steps in the study and even living room.
It's a rented property abroad so there would be limits to what could be done. Eventually, I'd also like to do things to home in the UK.
He's very well qualified. There are also others who advise it. Nonetheless, your views on it being an issue are well noted.
In any case, I remain interested in suggestions.
Duplicate
Last edited by Alansmithee; 11th January 2020 at 15:45.
I think W.H.O. Is a good reliable source:
https://www.who.int/peh-emf/about/Wh...en/index1.html
All papers with incriminating finding are from very dodgy journals, i.e. with a weak peer reviewing body.
Personally, believe that even if there is an effect, it must be so minimal not to be picked up by one of the thousands of scientific studies on the topic.
Don’t waste your money, and I would seriously question your doctor as there is no evidence that it’s harmful. I would be very surprised if they were actually GMC registered giving that advice.
OP does your ‘medical doctor’ have a primary medical qualification such as MBBS or MBChB and could I ask what specialty they practice in, i.e. general practice etc.?
Buy shungite and place it In every room. It apparently absorbs the waves.
I am fascinated.
Not only does shungite kill EMF radiation, you can also use it to purify water, which then serves as cure against cold and flu, allergies, kidney and liver issues, diabetes, heart disease, fatigue, headaches and broken legs. And the team who have found out received a Nobel prize for it! It's true, I read it on the internet.
You can order the shungite from my webshop here. Enter 'tinfoil' for a 10% discount.
Last edited by Raffe; 11th January 2020 at 23:35. Reason: added discount code, just for you!
I rarely contribute to the forum but this is a topic I know a tiny bit about.
I cannot offer the OP any advice on full EM shielding but I have just co-invented quite a nice way of absorbing part of the EM spectrum, namely S, X and L band radar using quite clever coatings
The aim being to make windfarms "invisible" to these radar bands.
Before anyone calls BS, this coating is now commercialised by Trelleborg; see here: https://www.trelleborg.com/en/applie...nagement/frame.
I don't think anybody suggests that electromagnetic radiation doesn't exist or isn't measurable. The interference with flight radar is a known problem and I have been involved in a project to use drones for measuring radiation interference, attempting to making building permissions for windfarms both speedier as well as cheaper.
On the other side we have the tinfoil fraction, who are either outright deluded or are just trying to make a profit from the deluded.
Hi Rusty
Thanks, always good to see research get out of the lab and into the real world.
As Raffe rightly points out in the post below, such coatings are aimed at making civil or military flights safer in the vicinity of windfarms and to help enable the permission to build.
Gary
Hi Raffe
Our RAM materials aim to absorb specific wavelengths, by up to about 35db, and have been demonstrated to work well on pylons up to 40m in height.
I appreciate that this is quite small-scale nowadays but we can model what happens with larger structures, of course.
We are also working on making the turbine blades "invisible ". We can do this easily but integrating our coatings into the blade manufacturing process, with current blades up to ~106m in length, being the challenge.
Anyway, nice to know that you can use drones to measure the radar signatures. If my colleagues need to carry out such testing, I know who to come to !
Sorry to the OP for going off-topic.
Regards
Gary
Thanks for the more informative replies. I'm sorry my polite request resulted in quite so much consternation.
Reservations noted among those who have stated them.
I remain interested in suggestions and unconvinced that EM shielding is not worthwhile, or at least not a reasonable precaution.
Rest assured my medical doctor and his colleagues' qualifications are sound. As an academic I do take such matters reasonably seriously.
AP.
If it gives you peace of mind, foil backed plasterboard will do a pretty decent job. There are also RF blocking paints and fabrics available, and whatever they build Tesco Extra supermarkets out of.
Edit - or get some of these:
Last edited by Mr Curta; 13th January 2020 at 20:47.
This reminds me of a story from about 20 years ago. At that time, personal mobile phones were just becoming common.
I used to work in Nuclear Power facilities at that time and one of the sites had technology where your phone would go dead as a door nail, zero bars when you passed through the gate.
One of the lads was keen on this 'blocking' device and wanted to know more. He was convinced that mobile phones were causing brain damage and all that so he wanted to get something like this for his house.
Turned out that the 'blocker' was in fact flooding the area with signal noise in the same frequency as mobile operators.
Edit: 2.45GHz is one of the typical Wi-Fi frequencies, not used by mobile phones - I was getting my wires crossed. Must be all the EM radiation we are exposed to!
Where is my faraday cage hat?!
Google "Faraday cage".
The principle is that no EM field can penetrate a void enclosed by a conductor.
In practice you do not need a solid cage, provided the holes in the cage are very much smaller than the wavelength of the EM wave that you are trying to exclude, then the cage will behave as if it were solid.
So, determine the highest frequency that you wish to exclude, & find the wavelength for that frequency.
wavelength = propagation velocity / frequency.
Where the propagation velocity is the speed of light.
Now divide by at least 10, and that is the maximum dimension for any aperture in the cage.
Your cage can be any conductive material, must cover all walls and ceilings and must be continuous, with electrical joints along all edges of whatever material you use.
Building a Faraday cage can be surprisingly expensive.
Also, if you are doing it for health reasons, it's a waste of time and money. Your health would be better served by ditching the quack and seeking more reasoned advice.
Remember that there is an industry wide term for alternative medicine that has been proven to work, it is referred to as "medicine"!
Thank's to those who've provided some constructive replies, it's much appreciated. It's good to keep an open mind.
I regret the more personal comments. It's been a while since I frequented the form and it seems to have changed a bit since.
Best wishes,
AP
PS Alansmithee, as some on the forum are aware I've spent some years where although a full body suit is not advised, a fair bit of body armour is. It's an interesting planet out there.