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Subject:
From:
Gary Camac <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 15 May 2000 10:53:44 -0500
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Steve,

I think the "magic" box does exist for high noise environments, but damned if I have any
details.  I remember reading of a technology that senses the noise then reproduces the
noise in the opposite polarity.  This cancels out part of the sound. Sorry I don't have
anymore details.

Gary Camac

"Thorup, John" wrote:

> Steve - I would think that you would want to replace and even improve upon
> the original sound isolation materials in the Electrovert even if there were
> indeed a "magic" box (which there isn't).  There are many newer types of
> foam insulation such as composites with a lead or other high mass material
> backing.  Start with the least amount of intrusive sound in the workplace.
> FYI the white noise solution, as pointed out, will not work in a high noise
> level environment.  It is a common technique used in low noise environments
> such as large open offices or cubie farms.  Low level white noise on a
> distributed sound system will mask the sound of your neighbor's phone
> conversation or his crappy radio station without actually being apparent.
> John Thorup
> > -----Original Message-----
> > From: Stephen R. Gregory
> > Sent: Friday, May 12, 2000 6:27 PM
> > To:   [log in to unmask]
> > Subject:      [TN] Noise suppression using "white noise"...
> >
> > Hi ya'll!!
> >
> > This post may be a little strange, but I'll ask anyway. We're getting
> > ready
> > to put a used Electrovert H-500 out on our floor. We currently have a old
> > Hollis Poly-clean. When you look at the blowers on a Poly-Clean compared
> > to
> > the blowers on the H-500, the H-500's blowers look about twice as
> > big...and
> > the Hollis is kinda' loud...but people don't complain too much when it's
> > running...I don't know about the H-500 though.
> >
> > The sound suppresion foam on the inside of the H-500 needs replacing, it's
> > deteriorated quite a bit. But there's a person here that is suggesting
> > that
> > instead of replacing the foam, look into "white noise" generators. This
> > person says that when they were in a machine shop environment, "white
> > noise
> > generators" were amazing as far as lowering the decible level of the
> > machines.
> >
> > I have to plead ignorance on this subject. Do any of you have any
> > knowledge
> > about this? Or have any first hand experience with "white noise
> > generators"?
> >
> > Myself, I think we should just replace the sound suppression foam, but
> > this
> > person swears that "white noise generators" is the way to go (but they
> > can't
> > tell me where I can find this stuff)...if that is true, where do I go to
> > get
> > these generators (speakers and certain frequency sources I assume)? Is
> > there
> > such equipment? I've searched the web, but can't find anybody that sells
> > this
> > stuff (makes me more confidant that I should just replace the sound
> > suppresion foam).
> >
> > Is this just a bunch of gobble-dee-gook or what?
> >
> > -Steve Gregory-
> >
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