omichalis
Date: Sat Jul 17, 2010 9:30 am ((PDT))
yes sure,
but there are a number of issues here..
- most hydros are piezoelectric transducers of some kind and their polar pa=
ttern is not the same throughout the spectrum
- hydros inside the water are hard to be fixed in a place - this means tha=
t we have to deal with a whole bunch of phase-related phenomena to end up =
with a correct stereo image of the underwater soundfield
also, I might be wrong in this, but I have a feeling that the speed of soun=
d in the water depends on how salty the water is - anybody knows ?
as I said, I just dip them in a distance of a couple of meters and that' s=
it !
m
On 17 =CE=99=CE=BF=CF=85=CE=BB 2010, at 6:45 =CE=BC.=CE=BC., Mitch Hill wro=
te:
> At 06:34 PM 7/17/2010 +0300, you wrote:
>
> >On 17 =C3=8E=E2=84=A2=C3=8E=C2=BF=C3=8F=E2=80=A6=C3=8E=C2=BB 2010, at 8:=
36 =C3=8F=E2=82=AC.=C3=8E=C2=BC., Kevin Colver wrote:
> >
> > > how far apart do
> > > underwater hydrophones need to be to produce a stereo effect,
> >
> >
> >I think is a particularly interesting question.. I have a feeling that
> >this should be really hard to deal with scientifically..
>
> Not so hard if you start with the fact sound travels in water at close to=
> 4700 ft/sec so its roughly 4 times the speed of sound in air... As long a=
s
> you take this into consideration when placing the hydrophones in relation=
> to the microphones, I'd expect a distance ratio of 4 to 1 should work...
>
> --
>
> Thanks,
> Mitch & Shadow...
>
> http://www.4shared.com/dir/UTASxktL/wildlife.html
>
> Shadow's area: http://www.4shared.com/dir/ecfWjyZb/Shadow.html
>
>
>
|