There was a download of Norsonic NorBuild 2.3 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software is an intellectual property of Norsonic Brechbhl AG. The program is included in Office Tools.
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. The most popular versions of the Norsonic NorBuild 4.0, 3.1 and 3.0. The program's installer file is generally known as NorBuild.exe.
From the developer:
The Nor-1028 NorBuild software package is designed to allow the calculation of building acoustic indices in accordance with the Building Regulations Approval Document E. If you are not sure which configuration is suitable for your application please contact our sales office for advice.
You may want to check out more software, such as Norsonic NorReview, which might be related to Norsonic NorBuild.