In article , Philip
writes


I am not quite replying to your exact question but hopefully, I will add
something of use here.

You mentioned that the site was exposed to wind, and you were proposing to
build a wall. Well its just that walls are not that good a acting as wind
breaks. The problem is that the wind hits your wall and is diverted up and
over. The results is lots of eddys and a more buffetting effect on the
leeward side of the wall.

A tall hedge on the other hand filters the wind. The wind hits your hedge
and is slowed down by the branches twigs and leaves. In these circumstancs
the leeward side of the hedge would be a more peaceful place than the
leeward side of a wall.

But a hedge is fairly rubbish at cutting out noise. Though you'll need a
very tall wall to cut out the traffic sound. A bank with a hedge on top
might do quite well if you have the room - no experience of that, but
it's what they seem to be doing alongside new bypasses nowadays.



--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm