In article
,
D.M. Procida wrote:
You will also need to line the blockwork with egg cartons or similar to
break up reflections.

Sadly, egg cartons don't - despite legend - have any acoustical
properties worth making use of.

They can have *some* use for acoustic treatment of a room - but that's a
different matter from sound insulation.

--
*Why do we say something is out of whack? What is a whack?

Dave Plowman London SW
To e-mail, change noise into sound.