posted on May, 7 2005 @ 02:21 AM
You can buy kits to build your own in the back of Boys Life (unless that is no longer possible thanks to our wonderful Homeland Security BS). The
range is limited to the effective range of the laser, taking into account the target range as well as the return path.
The laser is pointed at the target solid (windows work best) and the vibrations in the beam are read and encoded back into an audible signal.
> the beam's reflection, that is. the 'listener' would be two stations, the laser itself and a collector described below.
It wouldn't be too terribly difficult to build your own.. you'd need a lot of really small photoresistors or a CCD matrix to pick up the minute
vibrations in the beam, the rest is normal analog audio circuitry.
>> oh ok uhm is it obvious I didnt read the posted article? I really need to quit that... bad, bad geek, bad.
[edit on 7-5-2005 by apc]