Russell,
Heres a system Ive coined the Hyper Co-Incident mic:
https://soundcloud.com/urlme/pmhc1-water-rain-pebbles
This version is mounted inside and old AKG P3 dynamic mic body. (dynamic el=
ement removed). In the recording a thin foam cover and rode dead kitten are=
used as a windscreen.
The recording theme as its name suggests is water and thunder although its =
more of a quick demo for the stereo image / low frequency response all the =
way to 16 Khz.
BR
Mike.
--- In "rock_scallop" <> w=
rote:
>
> Hi Russell,
> I think we have heard plenty of examples shared here on this group of non=
-coincident arrays producing good stereo localization without any aberratio=
ns being noticeable or problematic. I also think coincident arrays like XY,=
Blumlein, and MS will also produce localization aberrations, like on-axis =
lobes, depending on the polar frequency response of the particular micropho=
nes used. Ocean and stream sounds can be especially challenging with any ar=
ray, and I would agree, at least in specific instances, a coincident array =
may help simplify things.
>
> John Hartog
> rockscallop.org
>
>
>
> --- In Russell Dawkins <rdawkins@> wrot=
e:
> >
> > Any stereo array can easily be tested for efficacy by the simple expedi=
ent of (while recording) walking across the soundfield in an arc equidistan=
t from the mic array. If the spatial representation is accurate as captured=
, when the recording is played back over properly positioned loudspeakers (=
=B130=BA for conventional stereo; =B145=BA for X-Y Blumlein crossed figure-=
of-eight) the footsteps should progress evenly from one side to the other. =
You could be forgiven for thinking this would be the result in most cases, =
but in fact it seems to work only with crossed figure of eights and M-S arr=
ays, both coincident. All spaced arrays produce extremely aberrant results =
with this experiment.
> > For most nature sound recordings I don't think it matters much - especi=
ally of animal sounds - but to me it does matter when I am trying to captur=
e what might be called an acoustic, such as a stream or a beachfront with w=
aves (to realistically capture the movement of the breaking part of the wav=
e).
> >
>
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