The preparation of acoustic measurements analysis reports, of acoustics calculation sheets and of sizing sheets for soundproofing equipment can be performed by ITS either in accordance with some standards (French or international), or in accordance with the methods of engineering associations (French or international), or based on developments made in-house.

Most of the software allowing acoustic predicting computation at ITS have been developed internally, which allows the integration of experience data complementing the best theoretical approaches of all times carefully selected in order to base the simulation models. (1) (2) (3) (4)

1 in terms of acoustics essentially
2 acoustic multilayered structures: partitions or absorbent linings and dissipative silencers: low or high temperature ...
3 enclosures, screens, laggings, suspended acoustical ceilings, wall cladding for reverberation treatment of rooms...
4 calculations of sound propagation indoor or outdoor, and from inside to outside of a building ...

With respect to such missions performed on its own behalf, ITS has taken out an "overall designer" insurance including notably the operation civil liability insurance, the professional civil liability insurance, and the compulsory insurance of decenal liability.

The preparation of acoustic measurements analysis reports by ITS allows (depending on the case) the characterization of the noise emission of an equipment or of an installation, the determination of the acoustic properties of a material or of a construction system, the quantification of the performance of a construction or of a room in terms of insulation.

See the list of calculations possible by ITS in relation to the analysis of acoustic measurements

  • calculations in relation to the determination of sound insulation performances of enclosures: according to measurements on site
  • calculations in relation to the determination of sound power levels of facilities for the evaluation of sound pressure levels in the environment
  • calculations in relation to the determination of sound power levels emitted by noise sources from the sound pressure
  • calculations in relation to the determination of spatial sound decay in industrial premises, tertiary premises and in subsets of buildings
  • calculations in relation to the determination of reverberation time in industrial premises, tertiary premises and in subsets of buildings
  • calculations in relation to the measurement of sound absorption in a reverberation room
  • calculations in relation to the measurement of sound insulation in buildings and of building elements
  • calculations in relation to the measurement of the performance of ducted silencers: insertion loss, flow noise and total pressure loss

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The performance of acoustics calculation sheets by ITS intervenes in the diagnosis of a situation in terms of acoustics, allows the definition of nuisance prevention means and the search for solutions in relation with the improvement of a situation in terms of acoustics.

See the list of acoustics calculations sheet spossible by ITS

  • calculation of the attenuation of sound during propagation outdoors (including: calculation of atmospheric attenuation)
  • calculation of the acoustic performance in buildings from the performance of elements: acoustic absorption of rooms and enclosed spaces
  • calculation of the acoustic performance in buildings from the performance of elements: sound insulation between premises
  • calculation of the acoustic performance in buildings from the performance of elements: insulation from noise coming from outside
  • calculation of the acoustic performance in buildings from the performance of elements: transmission of indoor sound to the outside
  • determination of the levels of emission sound pressure at the workplace and at other specified positions from the sound power level
  • prediction of control valves aerodynamic noise
  • prediction of jet noise (including safety valves noise)
  • prediction of piping systems discharge parameters
  • calculations in relation to the determination of sound power levels of facilities for the evaluation of sound pressure levels in the environment
  • calculations in relation to the determination of sound power levels emitted by noise sources from the sound pressure
  • calculation of sound propagation and noise prediction in workrooms
  • calculation of the spatial sound decay of industrial premises, tertiary premises (e.g. open spaces)
  • calculation of the reverberation time of industrial premises, tertiary premises (e.g. open spaces, restaurant & canteen, school rooms, nurseries spaces, swimming-pools) or of subsets of buildings

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The writing of sizing sheets by ITS allows the exhibition of evidences of the choices of soundproofing equipment (of those the implementation is compatible with the data taken into account as well as related constraints and meets the objective of results in terms of acoustics) involving a selection of products and of construction systems having the performance the most appropriate for the considered situation.

See the list of calculations possible by ITS in relation to the writing of sizing sheets for soundproofing equipment

  • calculation of the performance of an acoustic screen
  • prediction of the performance of dissipative silencers: insertion loss, flow noise and total pressure loss
  • prediction of the performance of resonnant: insertion loss, flow noise and total pressure loss
  • prediction of the acoustic performance of duct systems: straight duscts, bends, nozzles (including stacks directivity)
  • determination of the performance and sizing of safety valves
  • prediction of the sound reduction index of ducts (duct and pipe)
  • prediction of the sound reduction index of multilayered partitions: plane or orthotropic
  • prediction of the sound absorption coefficient for normal incidence of multilayered partitions: plane or orthotropic
  • prediction of the Sabine's factor of multilayered partitions: plane or orthotropic

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