Thanks much Klas, clear explanation, and confirms what I thought I was
"understanding." So, a set up like my Naks, where there's an
interchangeable capsule for directional and omni probably doesn't benefit
from the tubular sealing of a true omni, as the side baffling, i.e. opening=
behind the cap, are always there?
Ken
At 02:23 PM 2/23/2005, you wrote:
>Sorry, I'm sending the wrong postings to the wrong people here.
>
>An omni is a closed cylindrical can with a membrane as one of it's sides.
>The pressure inside of it tends to be constant, and tend to keep the
>membrane still, not so much affected by wind. (Or movement - handling
>noise). The membrane moves because the pressure inside the can is compared
>to the pressure outside of it.
>
>A directional mic is a tube, with a membrane as the only one side. Both
>sides of the membrane will get affected by wind, and there is no "constant
>pressure" tending to hold the membrane still.
>Therefore a directional mic need a much better wind protection than an omn=
i
>and is also more sensitive to handling noise.
>
>Imagine a tin-can where you have removed one side and replaced it with a
>piece of balloon-rubber. Imagine you blow on the rubber. It will not go so
>much inwards, as the pressure inside the can will hold it where it is.
>Imagine you move it. The same thing will happen. The membrane will not mov=
e
>much.
>
>Now imagine that you take a tube and place the same rubber over it and try
>the same experiments.
>
>If both have excellent suspension and wind protection, you will not find
>much difference.
>
>Klas.
>
>
>At 17:51 2005-02-23, you wrote:
>
> >Thanks, Klas, and let me get Rob off the hook - it wasn't him who posted
> >this but me, a newbie who really only has experience with indoor
> >recording. So I'm hearing this about omnis and wind reduction for the
> >first time. I'm not entirely clear on the theory behind this...
> >
> >As far as zeroing my meters, (0db, but not clipping) I did have the pres
> >up pretty far as the sounds were distant and only reaching -6DB
> >max. Sections where the wind was calm reveal a recording free of
> >distortion so far as I can tell so far.
> >
> >Anyway thanks again, I have some reading to do about basics, obviously.
> >
> >Ken
> >
> >
> >
> >
> >
> >
> >[Non-text portions of this message have been removed]
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>Telinga Microphones, Botarbo,
>S-748 96 Tobo, Sweden.
>Phone & fax int + 295 310 01
>email:
>
>
>[Non-text portions of this message have been removed]
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>
>
>Yahoo! Groups Sponsor
>ADVERTISEMENT
>
>
>----------
>Yahoo! Groups Links
> * To visit your group on the web, go to:
> *
> <http://groups.yahoo.com/group/naturerecordists/>http://groups.yahoo.com/=
group/naturerecordists/
>
> *
> * To unsubscribe from this group, send an email to:
> *
> <=3DUnsubscrib=
e>
>
> *
> * Your use of Yahoo! Groups is subject to the
> <http://docs.yahoo.com/info/terms/>Yahoo! Terms of Service.
________________________________________________________________________
________________________________________________________________________
|