Why do I need to simplify an architectural model for acoustic simulations in EASE?
In EASE, an acoustic model is a simplified representation of a room or venue containing the geometry and acoustic properties needed to simulate how sound behaves in the space. Unlike an architectural model, it only needs to represent features that are relevant to the acoustic simulation. EASE users often receive detailed architectural models from their clients and need to adapt them for this purpose. The following recommendations explain what to consider when preparing a suitable model for EASE.
What level of detail does an acoustic model need?
An acoustic model does not require all the geometric detail typically found in an architectural model. The goal is to include geometry that is acoustically relevant while simplifying or omitting details that are not.
Details that can typically be simplified or omitted include:
- Small elements such as doorknobs, shallow window mullions, trim, or handrail bars.
- Repetitive elements that can be represented by larger faces with appropriate absorption and scattering properties, such as audience seating or steps.
- Elements outside the room envelope, such as additional faces used to represent wall thickness.
Why is it important to simplify the model?
Many small architectural features are insignificant at the wavelengths relevant to room-acoustic simulations. Modeling them explicitly adds complexity without necessarily improving the accuracy of the results. Simplifying the geometry also reduces computational complexity, resulting in faster calculations and more robust simulations, particularly for large or complex spaces. In geometrical acoustics, sound propagation is represented using rays or particles that interact with the model surfaces. Unnecessary small faces can therefore introduce interactions that are not acoustically meaningful.
How can I simplify an architectural model for EASE?
When working with a detailed architectural 3D model, there are several ways to reduce its complexity before using it for acoustic simulation. Some of these steps are best performed in a CAD application before importing the model, while others can also be done directly in EASE.
- Limit the model to the relevant space. If the room is part of a larger building model, ask for an export that includes only the room or area you need.
- Remove unnecessary layers. Entire layers containing details that are not acoustically relevant can often be omitted.
- Re-trace only the relevant geometry. In some cases, it may be easier to trace the elements you need, such as the outline of a floor plan and a section, and copy them into a new, simplified file.
- Clean up the geometry in EASE. Use tools such as Subtract and Join Faces to simplify the model and make it easier to work with.
- Keep intermediate versions. Save multiple versions as you simplify the model so you can recover geometry that may have been removed accidentally.
- Consider rebuilding the model from 2D drawings. Sometimes, rebuilding the acoustic model directly in EASE from suitable floor plans and sections is more efficient than simplifying a complex 3D model.
What if…
…I need the details as a reference in my model?
You don’t need to model every detail in 3D. Instead, you can add 2D drawings or images to provide visual reference for elements that are not acoustically relevant, such as ceiling lights, furniture, or even text.
This allows you to keep useful visual information in the model without adding unnecessary geometric complexity.
Finding the right level of detail is ultimately a balance between representing acoustically relevant structures and keeping the model as simple as possible. For more guidance, see What is the necessary level of detail for an acoustic model?.
