All
cell phone users are now required by law in the state of California to use
a headset / hands free device. Many people use a headset for driving safety.
Those of us who are concerned about any possible heath issues resulting from the use of wireless gear have avoided the "bluetooth" headsets and opted for a wired headset instead. Unfortunately, it turns out that the wire can pickup the high power RF signals from the cell phone and transmit those directly to your head along with the sounds from your phone call. Studies have shown that using a wired headset can increase your exposure to cell phone radiation by up to 3X.
To reduce that radiation, you can use a Ferrite Bead. A Ferrite Bead is a clip you put on the wire of a headset. The bead is designed to soak up the radiation so you don't.
Lawrie Challis is a physicist and former chair of the Mobile Telecommunications and Health Research Programme^, a government panel in Britain: "They did tests at the University of York^ and found that under even the worst conditions, if you use a ferrite bead, you can't even measure the radiation coming off the wire. This common device kills the radiation."^
They're inexpensive and available at stores or online but watch out for online rip offs! These little bits of metal and plastic shouldn't cost more than a few dollars. We sell a larger unit (more damping ability) for nearly half the $14 others charge. Our Ferrite Bead fits cables up to 0.21" in diameter (most headset cables are about 0.1" allowing for a double loop of cable inside the Bead) and it just snaps in place. Very easy to install.
Here are some recent articles on the subject:
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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