Half a croissant, on a plate, with a sign in front of it saying '50c'
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I like this idea, only I think it should be run by the government.

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Audiocar

Power'd by ambient noise
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A vehicle is made that is super-lightweight and energy efficient (I'm thinking of the solar racers or the extreme fuel efficiency contest vehicles).

The outside of the vehicle is covered in microphones. As the ambient noise hits the vehicle it is converted to electrical energy, which (via a bank of capacitors) powers the vehicle.

Works best in noisy environments. To go faster, start shouting.

pocmloc, Sep 09 2009

We may as well include this safety measure... Audio_20Airbags
[normzone, Sep 09 2009]

Sound Power Level http://en.wikipedia...i/Sound_power_level
There's not much power available, and of course it disipates very quickly with distance. [neutrinos_shadow, Sep 10 2009]

[link]






       This car: is it visible to the naked eye?
nineteenthly, Sep 09 2009
  

       //Powerd//
poetic sp. "power'd"
AbsintheWithoutLeave, Sep 09 2009
  

       start it up outside a school playground.
po, Sep 09 2009
  

       Nice plan, Mr. M'Loc. Sadly, noise carries almost no power whatsoever, hence nineteenthly's comment and our global reliance on oil.
wagster, Sep 09 2009
  

       Thanks [AWL] for spotting the missing apostrophe.
pocmloc, Sep 09 2009
  

       So, how much power is available from sound? For example, if a 1-square-metre surface could capture all of the sound energy in a typical street, how much power would that be?
MaxwellBuchanan, Sep 09 2009
  

       A whole lot, I would think, but not quite enough to power a car forward.
DrWorm, Sep 09 2009
  

       pocmloc, your getaway car only works well with nuclear bombs exploding all around. (Ouch! no way either. The electromagnetic force would fry the electronics.)
rotary, Sep 10 2009
  
      
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