I don't remember posting the link to the BBC report. Anyway, it is here:
http://www.bbc.co.uk/news/science-environment-21340274
as well as some useful images, the acoustics of both the sphere and the
enclosing tank are pretty clear in the video. The sound inside the
sphere starts around 1'50.
http://www.bbc.co.uk/news/science-environment-21340274
Clearly the sphere is indeed just that, very much looking like a
pressure vessel (the surrounding tank will be filled with pure water),
probably not precisely spherical to optical grade, but "close enough for
jazz", and there will be a lot of stuff inside when all the detector
units are installed.
From my perspective the exercise is as much rhetorical as scientific.
Obviously the recorded responses in air will not directly correlate to a
sphere containing a lot of detector hardware,filled with borated-liquid
scintillator inside a tank filled with water (though that IMO is an
experiment that must be done one day). Dark matter particles, if any are
detected at all, will likely be sparsely distributed in both time and
space, so each detector "hit" will need all the help it can get in any
sonification, to not sound like the world's most boring geiger counter.
The detectors will record positional information, so of course an ideal
sonification will be periphonic.
The whole detector design is described here, from which we eventually
learn the sphere is 4M in diameter:
http://darkside.lngs.infn.it/ds-50/
Richard Dobson
On 09/02/2013 10:45, Dave Malham wrote:
On 8 February 2013 21:11, Fons Adriaensen <f...@linuxaudio.org> wrote:
If it's indeed a perfect metal sphere it shouldn't be too difficult
to *calculate* its response.
I think a certain Dr. Helmholtz did this a yea or two ago, didn't he?
Not quite in my lifetime, but... :-0
Dave
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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