SoundPLAN supports and complies with changes that have been proposed to ISO/TR 17534-3:2015, (, relating to acoustics software for the implementation of standards associated with the calculation of sound outdoors.

Additional recommendations have been proposed for the calculation method of ISO 9613‑2. This International Standard ISO 9613-2 outlines the measures necessary to ensure a high quality of calculation methods for acoustic measurement.

The Technical Report ( contains additional recommendations for the calculation method that are agreed on to be implemented in software quality ensured test cases with detailed results that allow checking the correct implementation and forms to declare conformity with these requirements by a specified software product. SoundPLAN is a member of the working group that has helped develop these new measures.

The recommended changes outlined to ISO 9613-2 will help improve the accuracy of calculated sound levels, which can currently differ significantly.