Mobile phones to charge-up by the power of your voice?!

9 May 2011

Bitterwallet - mobile phones might or might not give you cancerThe single most irritating thing about our mobile phones is that they constantly need charging up. However, thanks to some brilliantly batshit engineers from South Korea, our chargers could become obsolete.

They're devising a system which would see your phone charging up by the power of your voice. That means your conversations would replenish the power, which is bafflingly great!

Dr Sang-Woo Kim of the institute of nanotechnology at Sungkyunkwan University in Seoul has been talking about a technique that turns energy from sound into electricity.

Kim said: "The sound that always exists in our everyday life and environments has been overlooked as a source. This motivated us to realise power generation by turning sound energy from speech, music or noise into electrical power."

So how does it work? Well, small wires made of zinc oxide are placed between two electrodes and a pad on top vibrates when sound waves hit it. This causes the wires to compress and release, which in turn, would generate an electrical current to charge your battery.

At the moment, 100dB of sound produces 50mV of electricity, which isn't enough to charge a phone. However, these engineers are working on it, meaning that the wires will produce a charge from much lower sounds, meaning that life's background noises will charge your battery.

TOPICS:   Technology   Mobile   Freebies

10 comments

  • klingelton
    This is brilliant. I love innovation.
  • Tweedskin
    Surely this happens already with microphones and house telephones and in reverse with speakers? And what if you have no one to talk to?
  • Brandon H.
    Koreans are awesome. Though i can't help thinking this is just a variation of piezoelectric, like the energyproducing dance floor, but with much smaller sound vibrations involved. http://inhabitat.com/green-a-go-go-at-londons-first-eco-disco/
  • Brandon H.
    @Tweedskin <And what if you have no one to talk to It takes energy from vibrations (sound or otherwise) even when not in call. After all, there is always noise around us.
  • Phil
    Right - So the couple of milliamps generated from each call are going to keep a modern smartphone running for about an extra 30 seconds if your lucky. You'd do better to have a slightly bigger battery - probably cheaper anyway!
  • Boris
    YOU COULD ALWAYS SHOUT REALLY LOUD ALL OF THE TIME TO KEEP IT CHARGED UP.
  • BORIS
    I AM A GENIUS AND INSPIRED BY THIS ARTICLE I HAVE INVENTED A KEYBOARD THAT IS POWERED WHEN YOU HIT THE KEYS. IF YOU HIT THEM VERY HARD IT POWERS THE LAPTOP TOO. CAPSLOCK GIVES IT A BIGGER BOOST. I THINK I AM VERY FUNNY. PLEASE LOVE ME.
  • BORIS
    THE ONLY PROBLEM IS YOU HAVE TO KEEP TYPING ALL THE TIME FOR THE COMPUTER TO WORK SO I AM GOING TO HAVE TO POST OVER AND OVER AGAIN ALL DAY IN CAPS. SORRY BUT I HAVE REMOVED THE MAINS CABLE AND HAVE TO KEEP THE BATTERY CHARGED BY DOING THIS. PLEASE NOTICE ME. please
  • Kevin N.
    I'd have thought Patrice Evra would have been able to afford a decent hands-free kit.
  • Late
    Sod the mobile phone implications, the Koreans have solved the world's energy crisis. Expect OPEC countries to invade them any day now.

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