omichalis
Date: Sat Jul 17, 2010 10:02 am ((PDT))
I was also thinking of some sort of buffle that would serve as a stabilizer=
or sth similar
m
On 17 =CE=99=CE=BF=CF=85=CE=BB 2010, at 7:53 =CE=BC.=CE=BC., Mitch Hill wro=
te:
> At 07:30 PM 7/17/2010 +0300, you wrote:
>
> >also, I might be wrong in this, but I have a feeling that the speed of
> >sound in the water depends on how salty the water is - anybody knows ?
>
> Yes, you are correct... What I stated was a rough "rule of thumb". You
> can make this as complicated or simple as you want or need. Salinity and=
> temperature of the water also has an effect.
>
> Wikipedia has a good section on speed of sound that includes air and wate=
r
> as well as other mediums. In water, they have formulas to include effects=
> of salinity and temperature if you wish to investigate it that far... As=
> to fixing hydrophones in place in water, its not hard, a three point
> anchoring system, i.e.three cement blocks and some sort of flotation devi=
ce
> to tension the hydrophone against the anchor lines, a block of styrofoam =
or
> a milk jug works great...
>
> --
>
> Thanks,
> Mitch & Shadow...
>
> http://www.4shared.com/dir/UTASxktL/wildlife.html
>
> Shadow's area: http://www.4shared.com/dir/ecfWjyZb/Shadow.html
>
>
>
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