Predicts the sound insulation
performance of single, double and triple panel Walls, Floors, Ceilings and Windows
Triple Glazing Predictions
Accurate estimates of
Transmission Loss (TL), Weighted Sound Reduction Inces (Rw, STC, OITC), Sound
Level Difference (Dnt,w) including C and Ctr corrections and Impact
Sound Pressure Level (Ln,w and IIC)
Predicts the Impact Sound Pressure
Level for concrete floors with different floor coverings INSUL can also predict
lightweight and timber floors
Evaluation based on Impact Insulation
Class or Weighted Sound Pressure Level (IIC, Ln,w)
Predicts rainfall on roofs, both
natural rainfall and laboratory rainfall ( ISO 140-18 )
Calculates indoor sound levels from outdoor noise sources (EN 12354/3)
INSUL predicts profiled metal sheets
including complex double skin constructions
Database of hundreds of
common builders work material and floor covering
Material Database Editor
Flanking noise indicator
New Frame Types
Improved user interface
Prediction of Composite Wall Segments
by area ratio (i.e., Wall, Door, Window, etc.)
INSULuses robust theoretical
models that are quick to calculate and only require easily obtainable
construction information. The program can make good estimates of the
Transmission Loss (TL). Weighted Sound Reduction Index (Rw or STC) and
Impact Sound Insulation (Ln,w or IIC).
INSUL takes account of finite size effects which
are especially important when predicting small samples such as windows. Like
any prediction tool, INSUL is not a substitute for measurement. However, extensive
comparisons with test data indicate INSUL reliably predicts Rw/STC values to within 3 dB for most
constructions, and IIC/Ln,w
values to within 5 dB.
Screen Display: Staggered Wall Construction
Screen Display: Ceiling Construction
INSUL can be used to quickly evaluate new materials and systems, or
to investigate the effects of changes to existing designs.It models materials using the simple mass law and coincidence frequency approach
and models more complex partitions using work by Sharp, Cremer and others.It can predict the effect of installing an
acoustic blanket in the stud cavity.It has
evolved over several versions into a very easy to use tool that takes advantage of the
Windows environment, and has been refined by continued comparison with laboratory
tests to provide acceptable accuracy for a wide range of constructions.
greatly enhance the ability of acoustic consultants and product manufacturers to quickly
and confidently specify constructions in order to achieve a desired airborne sound
Composite Transmission Loss Calculation
INSUL includes the ability to predict the effect of leakage. This is
especially useful for predicting the sound insulation of doors and windows
which are notoriously difficult to seal perfectly. INSULuses the theory
published by Gomperts (The Sound Transmission of Circular and Slit Shaped
Apertures in Walls (Gomperts and Kihlman 1967 Acustica Vol 18)) to firstly
predict the transmission loss of thin slits and then the combined
transmission loss of the slit and the partition.
A composite transmission
loss calculator allows to compute the total Transmission Loss for a
composite Wall Assembly. This software feature can either use INSUL
data or the user can enter own data. The calculation works with either 1/3
or 1/1 Octave data.
Prediction of Rain Noise
Calculation from Outdoor
to Indoor Transmission
INSUL predicts rain noise according to ISO 140-18.
• Prediction for light weight & heavy roof construction
• ISO 140-18 simulated rain or natural rainfall
• Predictions for corrugated and ribbed roof panels
• Predictions for single roof panels or roof panels with
a ceiling beneath
• Predictions of sound pressure level, sound intensity
level and sound power level, with results given in
third octave bands, octave bands, dBA, NC & PNC
calculates the noise
level inside a room due to outdoor noise.
Calculations are based on EN 12354/3. The prediction accounts for the sound
transmission loss (STL) of the building façade, the size of the room and its
acoustical characteristics. Up to five different elements (e.g door, wall,
window, roof, floor) can be included. STL data can come from INSUL
manually entered from other data.
Several standard outdoor noise spectra are available (e.g. traffic noise,
aircraft noise, entertainment noise, voice). INSUL
can be used to design the
optimum façade element to match the design requirements.
Prediction of Impact Sound for light weight floors
Sound Insulation of
INSUL can now
predict the impact sound insulation of light weight floors.
Impact sound insulation predictions can now be carried out for different
joist constructions including timber joists and ZGirts. The prediction
routines are sensitive to the dimensions of the joists, their mass and
spacing and all of these variables can be set independently in INSUL.
A range of floor linings is available including plywood, particle board,
orientated strand board (OSB) and thin timber floor boards.
As with previous versions of INSUL,
ceilings can also be included in the predictions, with a range of ceiling
connections including directing fixing to the joists, rubber isolation clips
and separate ceiling joists. INSUL also
includes the option to add infill material in the cavity of the
can now predict the sound insulation of a variety of light weight
sandwich panels. A typical example would be panels with thin steel or
aluminium skins, with a polystyrene or mineral wool core. For instance
panels from Kingspan or Paroc. The sound insulation both of single panels
and panels used in more complex constructions can be predicted. The
properites of the core can be adjusted using the in built materials
In addition sandwich panels with much stiffer cores can also be predicted, a
typical example would be a panel with steel facings and a light weight
aerated concrete (Speedwall)
Trapezoidal Profiled Metal Panels
Porous Blankets and
INSULhas improved the
prediction of profiled metal panels, typically used for commercial and
industrial buildings. Previously only single panels could be predicted, and
not complex constructions using corrugated or profiled panels. New routines
based on the work of Lam and Windle in England allow more accurate
prediction of particular profiles, and of constructions using profiled
panels in conjunction with flat sheets and in cavity constructions as well.
For instance the effect of a layer of plywood underneath a profiled steel
skin can be predicted. Then this can be extended by adding an air gap and a
second lining, with or without an acoustic blanket in the cavity.
can now predict the sound transmission loss of porous blankets either
alone or as a facing for a construction. Typical constructions would include
modular panels for acoustic enclosures that have a steel skin with a mineral
wool infill and perforated steel internal facing.