cdb wrote:
> 
> :: floors can bounce up and down from a person walking.
> 
> During the times of the Samurai, the Japanese
>  used to have a Nightingale floor, special floor made of wood, 
> designed to creak and 'sing' if someone walked on it.
> 
> The target customer being a paraniod Samurai who feared being killed 
> in his sleep - the floor would wake him or his guards if such a thing 
> were attempted.
> 
> I wonder if the knowledge exists to build one today?

Easy. Mount a strain gauge to any floor, connect it to a PIC, with a
piezo speaker for the sound of your choice :)

Cheers,

Bob
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