Rules of thumb should never replace true engineering but can serve to narrow down a starting point or as simplified conversation with the laity. This paper will discussion some of the rules of thumb related to speech privacy and good design practices. When the rules of thumb might be appropriate and when they may not. We will also take a few moments to explore common myths about sound isolation.
Kenneth W. Good (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: