Feeds

Mobile phone signals prevent sleep, claim boffins

Keeps the Sandman at bay

Mobile application security vulnerability report

Updated If you’re wondering why you rarely get a good night’s sleep, then a group of boffins may have the answer: it’s because of your late-night mobile phone calls.

A joint study by the Karolinska Institute in Sweden and Wayne State University in the US studied small groups of men and women between the ages of 18 and 45.

It found that when exposed to GSM wireless signals before going to bed, the guinea pigs participants took longer to drift off into deep sleep and then spent less time in that state than unexposed sleepers did. They also experienced headaches and confusion.

The 884MHz frequency used is close to that used by some mobile networks. But UK mobile services operate on a host of frequencies, ranging from 872-960MHz and 1920-2170MHz, including frequencies in between.

Those participants exposed to the mobile phone signals were exposed for three hours at at time, arguably longer than most phone calls. The researchers described this as a "worse case scenario".

Sleep phone study rig

"This is Steve. I'm not in right now..."

Rather than use a real phone, the scientists effectively strapped a transmitter to each subject's head. The radiation was sent toward the left side of of the head.

The exposure was set to 1.4W/kg - less than both the US and European phone radiation exposure limits: 1.6W/kg and 2.0W/kg, respectively.

During the radiation sessions participants carried out performance and memory tests, rated their own experiences against a list of possible symptoms, and recorded their mood. As they slept, their brain activity was measured using an EEG, and after waking, they performed additional tests in the lab.

Researchers concluded that either mobile phones effect areas of our brains associated with activating and co-ordinating the stress system, or that cellular phone radiation disrupts the production of hormones controlling our body clocks.

Although if you sleep in the Starry Night Sleep Technology Bed then you'll probably be forgiven for never getting to sleep...

The paper can be read here (PDF).

Boost IT visibility and business value

More from The Register

next story
iPad? More like iFAD: We reveal why Apple fell into IBM's arms
But never fear fanbois, you're still lapping up iPhones, Macs
For Lenovo US, 8-inch Windows tablets are DEAD – long live 8-inch Windows tablets
Reports it's killing off smaller slabs are greatly exaggerated
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
Microsoft unsheathes cheap Android-killer: Behold, the Lumia 530
Say it with us: I'm King of the Landfill-ill-ill-ill
Seventh-gen SPARC silicon will accelerate Oracle databases
Uncle Larry's mutually-optimised stack to become clearer in August
EU dons gloves, pokes Google's deals with Android mobe makers
El Reg cops a squint at investigatory letters
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.