Peter, Robin, - I hope this topic will live on for a while, until
"everyone" understands, as it is one of the most important ones.
It's not only wind noise that gets worse, but handling noise as well.
(I may add that also a pressure gradient microphone can have two membranes.=
)
Klas.
At 23:13 2013-02-18, you wrote:
>Thanks, Robin. Why does this affect the type of wind shield
>required, apart from perhaps needing it in lighter winds?
>
>Peter Shute
>
> > -----Original Message-----
> > From:
> > On Behalf Of Robin
> > Sent: Tuesday, 19 February 2013 8:03 AM
> > To:
> > Subject: [Nature Recordists] Re: Is my equipment outdated?
> >
> >
> >
> > Peter Shute wrote:
> >
> > > David, can you please elaborate on the term "pressure gradient
> > > sensitive?"
> >
> > It's another way of saying the mic is directional. A
> > microphone that works based on a pressure-gradient has both
> > sides of the diaphragm open to the air, so that sound waves
> > are measured as a difference between the pressure on each
> > side of the diaphragm. The axis formed by the diaphragm is a
> > region of null pressure difference; the resulting polar
> > pattern is a figure eight.
> >
> > The second mic principle is pressure-operated. Such mics have
> > only one face of the diaphragm open to pressure changes,
> > which is registers no matter where this originates. These
> > mics are omnidirectional.
> >
> > Other polar patterns are made up of combinations of these two
> > basic principles. For example, adding the two results in
> > cardioid (since one lobe of the figure eight has positive
> > phase and the other negative).
>
>
>------------------------------------
>
>"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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>
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