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New technology could power electronics with sound

By Matthew · 26 replies
May 9, 2011
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  1. South Korean electrical engineers are developing a technology that could recharge your phone battery with the sound of your voice, according to the Telegraph. Dr. Sang-Woo Kim said that various…

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  2. Trillionsin

    Trillionsin TS Evangelist Posts: 1,806   +407

    When my phone isnt in use, I dont want it picking up any kind of sounds... I want the microphone to be turned OFF when I hang up. Just my opinion.
  3. red1776

    red1776 Omnipotent Ruler of the Universe Posts: 5,073   +164

    Hmmm...I wonder who's phone here would recharge the fastest? ....I'm just sayin.
  4. TomSEA

    TomSEA TechSpot Chancellor Posts: 3,123   +1,617

    "I wonder who's phone here would recharge the fastest?"

    Any woman. :p
  5. Basher

    Basher TS Rookie Posts: 54

    The microphone isn't going to be involved at all. Literally everything around you is already picking up these vibrations, they just aren't doing anything with them. This is just an attempt to make electricity out of something that is constantly around us, not being utilized.
  6. Something about the conservation of energy makes this improbable for a few of their "practical" applications.
  7. Trillionsin

    Trillionsin TS Evangelist Posts: 1,806   +407

    Good point... still capabilities of this technology could still record all sound... maybe that would defeat the purpose though.. recording sound would require power... hmm.. well whatever happens I dont want all my drug talkin' going out on cell phone towers. LOL
  8. Modeazy

    Modeazy TS Rookie Posts: 27

    Oh I love alternative energy!Hope I live long enough to rock 'em!
  9. yRaz

    yRaz Nigerian Prince Posts: 2,881   +2,201

    New format: Electricity.

    First it was tapes, then CD's, MP3 players. Now we will have electricity players.
  10. gwailo247

    gwailo247 TechSpot Chancellor Posts: 2,007   +18

    " Earplugs. "
  11. Tekkaraiden

    Tekkaraiden TS Evangelist Posts: 996   +93

    Apparently a jackhammer at 3 feet is 100dB.
  12. treetops

    treetops TS Evangelist Posts: 2,549   +543

    Wouldn't it be awesome if we could harness the sound of the earth moving.
  13. abe10tiger

    abe10tiger TechSpot Paladin Posts: 612   +16

    Hooray! All I have to do is babble to charge mah phone. lol. xD
  14. captaincranky

    captaincranky TechSpot Addict Posts: 14,907   +3,976

    Spanish cultures have a custom of women who are paid to cry at funerals and such, called "lloronas". Perhaps this could be a side business for them, gang charging cell phones.

    What would be even more awesome is, if the earth actually did move, when your girlfriend told you it did.....:rolleyes:
  15. Uhhh... I'm not sure it works that way. The amount of power you're using to play said favorite song will be greater (probably much more so) than the amount of power you will get back from the sound waves and vibrations. In other words, you're using a net more energy. Plus, speakers are meant to push sound waves away from a device and towards the user; since very little of it will feed back into the device, there's an even greater loss there.

    Better to just not play the song and let environmental sound waves and vibrations help keep your battery charged if battery power is your concern.

    Playing your favorite song for the sake of playing your favorite song is something else entirely, of course.
  16. matrix86

    matrix86 TS Guru Posts: 846   +38

    I don't think you understand how this works. Sound is not being recorded. This works off of the vibrations from the sounds (sounds are nothing but pitches which are nothing but frequencies which are nothing but vibrations produced at different levels). So what is essentially happening is that the thing is picking up the vibrations from the frequencies all around us (a music note, a hum of a car engine, a squeak from the brakes of an 18 wheeler, the dinging of an elevator, the hum of a hard drive or fan, and I can keep going but it would take up a whole comment page, lol). There are sounds all around us and this machine is picking up the frequencies of those sounds and using the vibrations of those frequencies to create electricity. You also have to remember that it's the charger that's "recording" the sounds, not the actual device being charged.

    The big issue is will this charger produce more input of power than what the device it's charging is giving out. Not to mention that the charger may also be different depending on where you are (in a quite room listen to music compared to being out by the road with heavy traffic and a businesses playing music outside). I could very well be wrong about this part, but from what I read, this seems like a possible limit on this technology. Does it charge the same in a room with little noise when compared to a room with a lot of noise?

    Like I said, I could very well be wrong in my theories here, but this is what makes the most sense to me. The way I see it, either:

    1.) I'm wrong. This would suck, but as long as there is substantial proof, i'm not afraid to admit i'm wrong

    2.) I'm partially right. This would be cool but i'd love to hear what I missed and/or got wrong

    3.) I'm completely right. This would be pretty friggin sweet :p
  17. Looks like they are finally using the old principle that every microphone is built on to store the produced energy instead of converting it to data/sound for recording. Basically *any* microphone creates a current when its diaphragm is moving from picking up sound. 50 millivolts sounds about right; this is why we need microphone preamplifiers to boost the tiny signal to something useful before we can record the sound. But I guess they will have to find a way to just get more juice out of a moving diaphragm by itself if they want to use it as a source of energy.
  18. captaincranky

    captaincranky TechSpot Addict Posts: 14,907   +3,976

    Or phones that use less energy.

    On the other "hand", why not bring back the swinging counterweight that they used to use in self winding watches? Then all you need do is hand the phone to a teen aged boy, along with a copy of Playboy. Er, that would be the "fast charger" option.
  19. Archean

    Archean TechSpot Paladin Posts: 5,634   +98

    Or the other option, which would be CMBR as it is all around us.
  20. Oh no... now it's gonna give more reasons to some women to never shut up... :((( I'm already in pain... :(
  21. there is always the practical application of simply extending the life of the battery via a trickle charge, I see no reason why the device would need to be able to fully charge a battery quickly. If you're listening to your favorite song, perhaps you could listen to a few more as the battery is charging while your creating noise... but as for energy input, I don't see how it could ever keep pace with the energy drained.
  22. captaincranky

    captaincranky TechSpot Addict Posts: 14,907   +3,976

    That's sort of silly isn't it? Making noise while your favorite song is playing?
  23. ikesmasher

    ikesmasher TS Evangelist Posts: 3,050   +1,384

  24. I can generate more than 100mV just by hanging onto a couple of wires. This is voltage and not energy.n ie. volts x buggerall amps = buggerall energy. A small amorphous solar panel will produce significantly more energy. Better still get hold of a grank dynamo and you will actually get enough energy to make a call. This principle was pioneered by Traeger in Australia around 1920 for outback communication and it works well.
    Was this story started on April 1st. I expect so. There are always plenty of dills around to pass it on.
  25. If you lose your phone in the forest and a tree falls, will it charge your phone?

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