You might need to scroll down to find the Tags tray. This appears in the upper left corner of the Tags tray, on the right pane of the SketchUp window. To add a new tag for geometry, select the Geometry tag (in blue in the image below) and click on the plus-icon. If you already have defined tags in your model, you can move those tags under the Treble-Geometry folder. In Treble, you will be able to assign acoustic materials to each of these layers and to the single surfaces inside the layers. This folder needs to contain the geometry that you want to simulate.Ĭlick the button Create Treble Folder, this will create a new tag folder for Treble and a sub-tag folder for the Geometry.Īll tags must be contained in the Treble-Geometry tag folder, if they are to be included in the simulation. The Treble folder įor every new Treble model, you will be met with the error Unexpected tag folder hierarchy and you will need to create a Treble folder, which in SketchUp corresponds to a tag folder. A single tight spot in the geometry can slow down the process quite significantly. (Example: Tables and chairs, can be modelled as “open surfaces” because the legs and the thickness of the object do not affect the sound propagation very much, especially at low frequencies)Ī general rule of thumb is to simplify objects to 2-dimensional if the thickness is within 5 cm, but one can additionally relate to the wavelength that is in focus for the study (where a rule of thumb is to not model objects that are smaller than 1/4 of the wavelength). It is however important to make an assessment of whether a simplification will have an effect on the acoustic properties of the space. It is therefore desirable to keep the details of the model fairly low. Having very fine geometric details in the model can negatively impact the run-time of the wave-based simulation. Geometries protruding out of the external shell might be ignored. Make sure the group is tagged and placed inside the Treble Geometry folder. When a surface is touching the external shell, the intersecting surface should be placed in a group (or a component) different from the outer shell. The geometry must include a closed external volume (watertight outer shell).īoth “solids/closed surfaces” and “open surfaces” are allowed inside the external shell. There are certain restrictions to the geometry that Treble can work with, generally: When the extension is asking you to save your model, use the option Save As. If you already have models saved on your Treble profile you can fetch them by clicking Fetch model. In SketchUp the user can open existing models, import 3D files from other 3D modelling software or start a new model from scratch. Treble, in its current version, accepts geometry input (3D models) from SketchUp Pro 20.
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