What's New in Version 1.4.4: a) A bug in ISO 9613-2 calculations that resulted to crashes in some cases has been fixed. b) Some parts of the ISO 9613-2 calculation algorithm that were not using parallel processors, where refactored for parallel processing. c) Up to version 1.4.3 non parallel diffractions were detected only for edges on barriers. Now they are detected on all the edges of the environment. d) Wind Turbine noise source added. e) Minor bug fixes and improvements.