permaculture

[Keith Johnson <keithdj@mindspring.com>]

The zigzag form is also very useful for making a one-brick-thick wall 
very strong as well as making lots of great edge for planting and 
microclimates. I've got pix of a couple in my Patterns slide show.

Also I should have said that I planned a berm and earthen (or other) 
walls (with plantings upon them) for sound barriers.  I do, in addition, 
intend to use vegetation to support these initial structures in doing 
their job. Sorry for the poor phrasing.

sustain_ability@123mail.org wrote:

> 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]..
> >    
>
>  

--
Keith Johnson
Permaculture Activist Magazine
PO Box 1209
Black Mountain, NC 28711
(828)669-6336
http://www.permacultureactivist.net
also Patterns for Abundance Design & Consulting


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