My Posts lemon on 12 Jul 2007
I wish we could invent a device to absorb and convert sound energy into usable power
I wish we could someday invent a device to absorb and convert sound energy into usable power. Such device can be placed in high level noise areas, for example busy subways or tunnels. Converted energy, in electricity form, could be used for lights or others at the place. Those lights can be easily programmed to [...]
