What is the sound transmission loss of an open window?

Theory will tell us that it is 0, but measurements by the Australian Standard AS1191-2002 give different results! What is the sound absorption of an open window? Theory will tell us that it is unity, but measurements by the Australian Standard AS ISO 354-2006 give different results! This paper is about two "silly" measurements, but I think it uncovers deficiencies in our standards and measurement techniques, and in our application of the theoretical properties of sound in enclosures and sound transmission.http://trove.nla.gov.au/work/2643531