SPM9613V2 2.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The following version: 2.0 is the most frequently downloaded one by the program users.
This software is a product of Power Acoustics, Inc. The software lies within Education Tools, more precisely Science Tools. S9613200.exe is the common file name to indicate the SPM9613V2 installer. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
SPM9613 is a program designed for analyzing community noise and sound propagation emitted from a variety of noise sources. The program features automatic breakdown of large 3-D or line sources into multiple point sources, graphical capability to assure correct user inputs and 3-D Ground Elevation plots.
You may want to check out more software, such as StatPlus 2007, Avantage BPM Foundation or Adding Machine, which might be similar to SPM9613V2.