Noise Prediction for Industry and Wind Turbines

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Version 2021.1
Release date 29 April 2021


The setup includes an unregistered Free license for iNoise V2021 that is valid until 1-1-2022. All users with a registered Free license of previous versions of iNoise are advised to register again to receive a new registered Free license. Users with a purchased license on iNoise Pro V2020 or iNoise Enterprise V2020 which is not yet expired, can use their existing license files for V2021. 

Changes in iNoise 2021.1 compared to iNoise 2021

New and improved functionality

  • ‘View | 3D View’ menu option renamed to 3D View (current view).
  • Updated helpfile

Fixed issues

  • ISO 9613, ISO 9613 1/3 octaves and ISO 9613 road: In some cases barriers with transmission loss in combination with floating items could lead to a fatal error during calculation.
  • Export/import GMF: When the model exceeded the maximum longint value in cm’s (±21,474 kilometer) during export the model was created incorrectly during an import. To avoid this issue models that exceed the maximum value can not be exported to GMF anymore. In that case an information message is given.
  • In some cases ‘Help | Create Support Mail’ did not work and resulted in an error message.

Changes in iNoise 2021 compared to iNoise 2020

New and improved functionality

  • New features
    • Wind turbine screening limit option according to IOA-GPG in calculation settings for ISO 9613.1/2 and ISO 9613.1/2 (1/3 Octave) models. This option limits the topographic screening effects of the terrain to a reduction of no more then 2 dB and then only if there is no direct line of sight between the highest point on the turbine rotor and the calcuation point. For this purpose an additional property ‘Rotor diameter’ has been added to the Wind turbine item. The highest point on the rotor is calculated by taking the turbine height and adding half of the rotor diameter. (only for Pro and Enterprise configurations)
    • Georeference image option. Background Maps can now be calibrated/georeferenced with 2 known global GPS coordinates and sellecting the local coordinate and reference system. This option fully replaces the Georeference tool. Additionally several new countries and local coordinate systems have been added for the African, Asian, Australasian, European, North American, Central American/Caribbian and South American continents.
    • Quick links bar in the Side bar. This allows the user to enable or disable the showing of backgrounds, results and/or contours and to start a calcuation with a single click.
    • Edit property by expression. A specific property/field of a selected number of items can now be modified by using a numeric or textual expression that can use other properties/fields of the same item.
  • Increased performance
    • Increased performance of terrain model calculation for large noise mapping models. Memory usage has been reduced up to a factor of 2 and speed has been increased up to a factor of 100.
    • The terrain model is now calculated within a concave polygon around the entered height lines and height points. Items outside this concave poygon will get the default terrain height that is given in the calcuation settings.
    • Improved performance generating noise contours.
  • Increased usability and user experience
    • 3D View now uses the display settings of items. e.g. thematic colors and deselected items.
    • By default the 3D view shows the current 2D model view with a maximum of 10x10km. In case of a larger model a separate menu-item ‘3D full model’ is available.
    • Open model dialogue: Improved layout and direct edit option for area/version/model descriptions by clicking twice on the description.
    • Additional fields when exporting items to Shape. GRND_VALID and EXPORTED_H.
      – GRND_VALID: indicates whether the item’s ground level values ​​are valid / calculated
      – EXPORTED_H: indicates which height is exported, relative or absolute.
    • Export Point Results (TXT/SHP) and Batch export point results (SHP) now include the Item ID field.
    • Coordinates can now be pasted directly in the coordinate table of an item. The number of points/nodes of the item stays unchanged.
    • Option for orthogonal and straight angle entering of polygons
    • The menu option ‘File | Zip project’ now creates a zip file with the format <Project>
    • In the cross section floating items are not anymore connected with a (dotted) line to the ground plane. Only non-floating items are now shown with a solid line connected to the ground plane.
    • Improved simplify geometry option for items with very short segments.
    • DXF/DWG files. The accuracy has been improved for importing and drawing circles and arcs.
    • Updated helpfile

Fixed issues

  • Export to Google Earth: vertical contours are now shown on the correct height
  • ISO 9513.1/2 1/3 octaves: Wind turbine 1/3 octave results: For wind turbine results no 1/3 octave results for 20, 31 and 40 Hz octave band were presented. This has been fixed.
  • ISO 9613.1/2 : A foliage region attenuation was not limited to 200 meter. This has been fixed.
  • Source: When changing the height of a building underneath a source with height definition ‘Relative to item below’ the source height was not adjusted. This has been fixed.
  • Emitting roof and facade sources: When changing the emission type from total emission to emission per m2 the calculated results were not deleted. This has been fixed.
  • 3D view for large areas didn’t show, Continue button didn’t work properly.
  • Create receiver at facades: Creating receivers inside own building is now prevented.
  • Contour legend: Changing the font size had no effect on the legend. This has been fixed.
  • Polygone items: When adding points to a rectangular item the internal shape definition stayed rectangular. This resulted in an error when using the ‘Model | Check model | Items’ menu option. This has been fixed.
  • Receiver: Changing the name or description of a receiver deleted the results. This has been fixed.
  • The Georeference tool has been replaced by the new Georeference image option in the Background Maps menu option. This was needed because Google Earth stopped supporting the application programmers interface used by Georeference.

Minimum system requirements for using iNoise

  • Operating system: Microsoft Windows 7/8/10 (x64). The download link contains the 64-bit version of iNoise. If you wish to receive the 32-bit version of the software, please use this link
  • dual core processor, such as Intel Core i3, or AMD Phenom X2
  • 2 Gb RAM
  • With a Pro or Enterprise license (> 2 cores), a quad-core processor and more RAM memory are recommended
  • 500 Mb free disk space to install the software
  • Additional 100 Mb free disk space for each iNoise project. Larger iNoise projects can take more than 1 Gb of disk space
  • OpenGL support for 3D view
  • Printer: MS Windows printer
  • Internet access to download the software and to check for updates.