--- In "Rich Peet" <>
wrote:
>
> --- In Walter Knapp
<>
> wrote:
> > From: Curt Olson <>
> >
> > > I'm currently favoring a simple barrier array (183s mounted
> > > side-by-side and facing forward on opposite sides of a plywood
> > > barrier). I like the excellent L/R imaging and rock-solid mono
> > > compatibility. It also seems to deliver noticeably higher gain
> than the
> > > spaced arrays I've tried, but with a slightly hyped high end
> depending
> > > on the exact material used. Size of the barrier seems to have
a big
> > > effect on L/R imaging, so it gives a lot of room for tweaking.
The
> two
> > > biggest problems I would report are: 1) barrier arrays can get
bulky;
> > > 2) handling noise can be "off the charts," and foam padding
doesn't
> > > seem to help much.
> >
> > What you are describing is a crude Jecklin disk setup. Hunt up
info on
> > that. You'll find there are a bunch of variations.
> >
> > To take care of handling noise you need some form of suspension
between
> > you and the mic. A solid path carries the sound.
> >
> > Walt
> >
>
> I don't think he is. Sounds more like a conventional pzm barrier.
>
> Nothing is more crude than a Jecklin disk and any modification will
> likely be an improvement over the commercial design. I am still
> waiting to hear from anyone that says they like the sound of that
> setup for soundfields more than a couple feet away compared to
> anything else. I like barriers but imho the Jecklin is poorly
spendt
> time to build on your own and a big mistake to buy.
> Rich
I have a couple questions about this. What makes the Jecklin design
so inferior, and what sort of modifications would best improve the
commercial design? What sort of barriers do you prefer?
I have been experimenting with barriers with NT1-As and I83s. For
the NT1-As I made a barrier sort of like a Jecklin disk, but its
oval instead of round and its thicker - about two inches thick made
from some dense fiberglass acoustic tile material I found at the
local recycled scrap store. It seems to work well for directional
stereo with both mics out a couple inches from the surface and faced
strait forward.
For the 183s I have been working on a barrier for use with a dish.
First I tried mounting the mics on a small disk of thin metal -
about two inches diameter. This had great stereo for the subject
sounds, but it flipped left and right for more distant sounds. My
guess is sounds from the right reflect off the left side of the dish
and into the left mic. Today I am trying out a larger disk - it's
made from an old record, a standard LP what ever size that is. My
hope is it will shield the left and right of the dish from sounds
from the opposite sides. The mics are mounted to the surface of the
record facing into the dish. I suppose this may have some pzm
effect, though I don't know much about pzms.
-John Hartog
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