ABSTRACT
The main means by which we achieve the necessary sound isolation in recording rooms is by reflexion, because absorption, as means of isolation, is rather disastrously inefficient. In typical isolation shells, the sounds produced within the rooms are reflected back from the boundaries, and thus contained within the space. Sounds emanating from without the room are similarly reflected back from whence they came, and thus little sound can penetrate the isolation barrier from one side or the other.
