Science Questions

Does putting your car key to your head increase its range?

Tue, 29th Sep 2015

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Danny Farrelly asked:

The myth of putting your car fob to your head and the locking or unlocking range of your car is increased by pressing the button.

i tried this experiment and it worked!

so i was wondering would it work for other things? and especially, WHY DOES THIS WORK

could you please get back to me i look forward to hearing from you :)


We put this question to tech investor Peter Cowley:Car Keys

Peter - As you say, if you go into YouTube, you'll find Clarkson for instance trying it a few years ago. So there's no doubt it does work. Now, why it works? There are two potential ways of looking at this. One is that itís a technical one which is, the cavity which is usually your head say, or your chest is acting as either a resonator in some form at the frequency that itís sending or itís acting as a ground plane. There's quite a lot of evidence that might be true. But if you look also a bit deeper, it may just simply be that you're raising it higher up, further from the ground. And so, there's no direct proof of either of those being correct.

Chris - That's your problem Kat. You're a little bit close to the ground.

Kat - I am. My head is so full of brain, thatís why it doesnít workÖ

Peter - I should point out, the transmitted power from a little keyless remote is massively less than mobile phones. So, you're not actually endangering your brain cells in doing this.


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