But beneath the coats of magnolia paint, she points out, the walls are lined with a special paper that contains a layer of tin-foil; and upstairs, the windows are hung with a fine, silvery gauze.

Sarah, 51, is one of a growing band of people who claim to be experiencing extreme - and incapacitating - sensitivity to electrical appliances, as well as to certain frequencies of electromagnetic waves.
"Wi-Fi, or wireless broadband networks, seem to be the worst thing," she says.
"Closely followed by mobile phones - particularly if they're being used in an enclosed space - the base stations of cordless telephones and mobile phone masts.
"I have to restrict the amount of time I spend on the computer or watching television, and make sure I don't have too many household appliances on at once, because that sets me off as well."
And she can venture into built-up areas only if she is swathed in a net-and-hat ensemble made from a special "shielding fabric" that makes her look like a bee-keeper.
Instead, she found an answer on Google - through websites such as
»www.electrosensitivity.org/ Using an
"electrosmog detector" - the name given to a device that can apparently register levels of electromagnetic activity - she checked her bedroom.
"And there was radiation streaming in through the one wall that I thought I hadn't needed to protect. We have some new neighbours, and I think they must have installed wireless broadband."
To ensure a good night's sleep, Sarah now takes the precaution of swathing herself in her special silver netting.
The World Health Organisation's position is that "there is no scientific basis to link ES symptoms to EMR exposure.
"Further, ES is not a medical diagnosis, nor is it clear that it represents a single medical problem."
In one "provocation" study, a number of people who claimed to have electrical sensitivity were placed in a room with a mobile phone and not told whether or not it was switched on.
Asked by a researcher how they felt, they failed to establish any link between physical symptoms and the alleged trigger.
It takes all kinds I guess. My guess would be they suffer some sort of psychosomatic illness and no amount of scientific testing would convince them otherwise.