bluetooth

Archived from groups: alt.cellular.bluetooth (More info?)

Does bluetooth work through water?

Michael

Archived from groups: alt.cellular.bluetooth (More info?)

Sheppy wrote:

> At a guess water will attenuate the signal far quicker than air, so yes it
> will work, but instead of a range of 10-20 metres - you'll only get a
> range of 1-3 metres; if your lucky. Also water proofing cannot be made of
> metal, so that's another problem.
>
>> Does bluetooth work through water?

Salt water probably not, the Navy's been working on moving RF through salt
water ever since the submarine was invented and not had any great
success--they can do it but at very low rate and using massive antennas.
Fresh water I don't know--RF generally goes through fresh water pretty
well, but IIRC Bluetooth uses a frequency pretty close to one of the
vibration modes of the water molecule so it may be absorbed more heavily
than usual. If I needed to know this I'd put a cell phone or PDA or
whatever in a half a dozen Ziplocs and then try it and see what happens.

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)