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Glazing#

INSUL provides a specific set of tools for modeling the sound insulation performance of glazing. There are several reasons for this:

  • Inherently low levels of internal damping in glass
  • Edge-only pane support
  • No intermediate framing in the cavities of multiple-layer systems
  • No acoustically absorptive infill in the cavities of multiple-layer systems

INSUL provides two separate methods for predicting the sound insulation performance of glazing systems.

Model
Comments
Energy-based The energy-based model is the default glazing prediction method when INSUL starts for the first time. It is a semi-empirical model with a short calculation time and it can be used for quick predictions. It was the only prediction method available in earlier versions of INSUL (for example, INSUL version 9).
Wave-based The wave-based model is the recommended prediction model. It has a longer calculation time, but the results are generally incrementally more accuarte than results using the energy-based model. This model is less reliant on empirical corrections.

To model a glazing system, select Glazing from the INSUL Construction tabs.

To change between the energy-based and wave-based prediction models, select the small refresh button in the upper, righ-hand corner of the Glazing tab.

Glazing.png

How to model Quad glazing

To model Quad glazing, the wave-based glazing model should be used.

The energy-based model is not able to prediction sound insulation performance for Quad systems.

Energy-based Model#

GlazingTabEnergyModel.png

  • Use the INSUL Panel tabs to select Single, Double or Triple as required
  • Select the type of glass for the model from the drop-down list.
    Monolithic and laminated glass materials are available.
  • For Double and Triple systems, specifiy the Space between panes, whether the cavity if Argon filled and whether the frame is a Timber sash

As each input to the model is changed, INSUL updates the predicted sound insulation values.

Wave-based Model#

GlazingTabWaveModel.png

  • Use the INSUL Panel tabs to select Single, Double, Triple or Quad as required
  • Select the type of glass for the model from the panel tabs ~ for example, Double > Panel 1, Double > Panel 2 or Triple > Panel 3.
    Monolithic and laminated glass materials are available.
  • For Double, Triple and Quad systems, specifiy cavity details using the frame tabs ~ for example, Double > Frame 1 or Triple > Frame 2.
    A range of different pane connections and cavity gases are available.

Tutorial#