AcouS STING® Software

AcouS STING® is the software follom-up of AcouS STIFF®.

This allows for a long time to assess the sound reduction index of single and complex walls and has naturally been used to calculate the sound reduction index of complex floors.

Regarding the latter, the noise level of shock is the second criterion to assess the acoustic performance of a floor.

Available in french and english

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AcouS STING presentation

Noise impact prediction software

AcouS STING® software is a simple and adaptable tool that allows you to :

  • Determine the level of impact noise of a simple and complex floor,
  • Assist in new product development,
  • Optimize laboratory measurements campaigns,
  • Appreciate the performance of a floor covering,
  • Extrapolate the performance of conventional structures,
  • Forecast unconventional structures and their optimization,
  • Understand the acoustic behavior of a floor.
The results are presented as graphs and/or tables showing the overall values in accordance with ISO 717-2.
Suspended ceiling simulation

Suspended ceiling simulation


Today AcouS STING® allows you to assess the level of impact noise floor complexes and by extension improve the noise impact of coatings or false ceilings associated with these floor complexes.

The level of noise impact of a floor can be measured in a laboratory specially designed for this purpose (cutting of cell transmission and reception, shapes and sizes of cells...).

However, this criterion depends on a very large number of parameters : thickness, density, stiffness of the constituent materials,...

Under these conditions, the number of walls to be tested is infinite and a uniquely experimental approach, in terms of the time and cost it represents, is not sufficient.

Predicting appears to be an essential complementary approach.

Both approaches, laboratory measurement and predicting, far from being opposed, are in fact complementary and necessary to each other. The experimental approach cannot be considered the only way to go, given the number of cases to be tested. The validation of simulation models should be done using a comparison with experimental values on properly chosen individual cases.

The is a simulation tool the level and improvement of impact noise.

The types of walls which can be calculated by AcouS STING® software

AcouS STIFF® software can perform calculations and projected levels of improvement in impact noise :

  • Heavy homogeneous floors,
  • Floating screeds,
  • Tiles on under layers,
  • Flexible flooring,
  • Suspended ceilings.
Calculation model

Homogeneous tiles

The model is based on an energy balance sheet of the slab

Formule de calcul dalle homogène

The energy injected by the hammer is distributed between the radiated energy and the dissipated energy.

The radiated energy is mainly controlled by the coefficient of radiation. The coefficient used is similar to that usually used finite thin plate and thus takes into account the dimensions of the plate and in particular the thickness which controls the critical frequency.

The dissipated energy is controlled by the coefficient of total losses, which included losses by internal viscosity and peripheral losses.

The injected energy is calculated from the characteristics of the hammer and takes into account the elasticity of the shock upon contact allowing a better approximation of the spectral density.

Temporal shape of the impact depending on the coating

Temporal shape of the impact depending on the coating

Floating screed

The model is a mass-spring type. This calculates the frequency response of the filter in order to evaluate the relationship between the applied force on the bare floor and the applied force across the floating system. This filter is mainly driven by the resonant frequency by the radio of impedance place / hammer and the loss factor. You deduce the ΔL of the relationship between these two forces.

Floating screed

Floating screed

Soft floors

This model is based on the same principle as the previous one with the difference that the mass of the system is also flexible. We must therefore evaluate differently the force applied by the hammer on the coating. We therefore calculate the force applied according to the temporal evolution of the contact and the relative deformation of each element of the contact.

Soft floor

Soft floor



  • Full slab
  • 14 cm reinforced concrete slab support.
  • Calculation : LNA = 81, LNW = 76
  • Measure n°9 : LNA = 81, LNW = 77


  • Heated floor
  • Topping slab with 4 cm pads on a reinforced concrete slab support of 14 cm.
  • Calculation : LNA = 70, LNW = 61
  • Measure : LNA = 71, LNW = 63


  • Flexible floor
  • Covering of flexible flooring with PVC foam on upside to a total thickness of 3 mm.
  • Calculation : ΔLNA = 9, ΔLNW = 13
  • Measure : ΔLNA = 11, ΔLNW = 14


  • Support slab with suspended ceiling
  • 14 cm support reinforced concrete slab with suspended ceiling consisting of 75 mineral wool, 25 mm air gap and two BA13.
  • Calculation : LNA = 57, LNW = 52
  • Measure : LNA = 57, LNW = 51

Formation AcouS STING®

Next training : to be determined

Training Objectives

  • Provide participants with the basic knowledge to understand the acoustic behavior of a floor and to highlight the influence of parameters which can be uses to optimize a piece of work.
  • Mastering the use of AcouS STING® software.

People concerned

The course is valuable for engineers who design or prescribe the walls and floors, including :

  • the engineers of studies to advocate constructive systems
  • technical sales responsible for prescribing a derivative work of a system catalog,
  • the engineers of R&D department responsible for the development of a wall and a floor, or an assembly system, or manufacturing technology.

For more information contact Marion Lorin

Similar sessions

Maintenance & Updates

Related services

  • A maintenance contract

This maintenance contract provides among other things : the maintenance of the software and the dongle, the delivery of software updates for free for holders of the maintenance contract, phone support, special discounts on other software....

  • Updates

Each year a new version containing additions or changes in the software is available.

  • Training and seminars

We regularly organize inter-company and intra-company training courses on the use of the software.

  • Day of information and exchange

Each year and each software program, at least one day of information and discussion is held with the users of such software.

  • Calculations on demand service

We can do calculations of acoustic simulations on request with the use of our software.

You can avail of these services free or at very favorable terms for an annual fee.


You will find answers below to some questions you ask and which we hope give you the information you seek .

  • Does the AcouS STING® software take the influence of sub-layers into account?

    Yes, here are some examples of the tiles under the supports and associated layers that the software takes into account :

    Example 1 : solid concrete slab with polyethylene

    Example 2 : honeycomb slab with polyurethane

    Example 3 : the solid wood floor with the textile fibers

    Example 4 : the floor plate with bitumen + fibers


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