I am working on a project to provide extremely weatherproof,
permanently-mounted mics for use on the exterior of sea-going vessels.
I have built a prototype that I believe can withstand long-term
exposure to environmental extremes, including ice, salt spray and UV
exposure. This is possible due to the limited demands for fidelity
and a bandwidth of less than 1KHz.
I'm bringing this to the group because I suspect that, collectively,
you might have some insights on windscreen design. To build a wind
(and splash) screen that is effective in a twenty-knot wind that will
shed water, so as not to ice up or loose its effectiveness or
significantly attenuate the sound is no easy task. Furthermore, it
has to be substantial enough to withstand the forces that be and UV
exposure for at least a year. Is this preposterous, or might anyone
have any relevant experience to share.
I think that it is reasonable to expect some maintenance during use in
a snowstorm, for instance. But ideally, I build something that just
listens without constant attention.
The mic is mounted vertically and has a recessed diaphragm. Inside
this recession is a baffle and a small foam wind screen. I have
considered just wrapping a fibrous nylon cover around the mic, but
this isn't as effective as I'd wish. I wonder if I could make a thin
waterproof-breathable (such as GoreTex)shell and put a furry or
fibrous filling within?
I have reviewed the discussion from November about using hogshair or
nylon buffing pads to break up water impacts. Has anyone seen what
happens to this in freezing weather?
Any ideas or information gained from practical experience will be
sincerely appreciated!
Regards, Robb
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
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