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  • From: sustain_ability@123mail.org
  • To: "permaculture" <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] noise barrier
  • Date: Fri, 21 Apr 2006 21:20:45 -0400


I seem to remember a zig-zag shape for a noise reducing wall (composed
of a suitable material), so that the sound waves cancel each other out
(in principle). The opposite effect is achieved in concert halls.
Rushing water is a good idea, I'll bet.
Best
George

On Fri, 21 Apr 2006 09:14:02 -0700, "Toby Hemenway"
<toby@patternliteracy.com> said:
> Vegetation is not very effective at blocking noise unless it is dense and
> 20-40 feet wide. Ten feet of dense hedge helps some, but loud noises like
> traffic, dog barks, or animated conversations will penetrate it easily.
> For
> an effective barrier, you'll need something solid. Two thin walls with an
> air gap between is very effective.
>
> Toby
>..[snip]..

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