Acoustic distance measurement test results

[Benjamin M. Schwartz]

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quozl at laptop.org wrote:
> How high off the ground were the laptops?  At ground height, with ears
> up, the node to node transmission distance is very small.  That's why
> school server antennas will be mounted high.

The laptops were sitting directly on the ground.

> A football field normally has very little slope, so the terrain
> obstruction is easily understood.

Specifically, the laptops were sitting on the rubberized track surrounding the
field.  The surface appeared perfectly level to me, and free of obstructions
apart from myself.

It's entirely possible that what I saw was actually some unknown unrelated
software bug.  I wasn't intending to test wireless range, so I can't really say
anything more conclusive than "it worked easily to at least 25m".

- --Ben
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