If it is desired to propose high-performance and sometimes innovative noise abatement solutions, R & D in acoustics work is needed, i.e. in the field of science and technology relating to the study of acoustic vibrations and concerning their production, their propagation and effects.
The limitation of the transmission of sounds through walls is an important field of investigation, allowing the development of construction systems for the building sector (walls and partitions, often made up of multilayer flat walls), as for industry where many building envelope elements are constructed from orthotropic walls (e.g. cladding, corrugated sheets), sometimes with connections (between leaves).
Specific modeling is necessary to take into account the physical phenomena then present, including sound propagation in porous media, which also plays a major role in the phenomenon of acoustic absorption (useful in architectural acoustics) or in the performance of dissipative silencers, such as those for ventilation and air-conditioning installations, as well as those used for the air intake of fans and turbines (as well as for their exaust), or those which must be considered for the depressurization of industrial gases.
In this particular case, sizing involves other calculations that are impossible without major R & D (Research and Development) work in acoustics: prediction of aerodynamic noise of control valves, of jet noise (including noise of safety valves) and of parameters of discharge of fluid networks, performance determination and dimensioning of safety valves.
More generally, projects related to the quantification of the sound impact of aeraulic networks necessitate further calculations: prediction of the acoustic performance of duct walls, of break-out noise, of the acoustic performance of the elbows, prediction of the reflection of the nozzles, prediction of the directivity of chimneys.Reactive mufflers, often used to mitigate the exhaust noise of thermal engines (e.g. high-power generators), also require advanced calculation and simulation means, derived from acoustic R & D work, when it comes to the evaluation of the effectiveness of devices designed to limit noise emissions with aerodynamic performance which should not impair proper operation.
Of course, flow noises constitute a choice modeling work when a fluid is in motion, even in a soundproofing device.
Moreover, sound propagation in the air, either indoors (e.g. in relation to the reverberation of premises and with related problems such as spatial noise decay e.g. in work premises) or outdoors (e.g. for the preservation of the environment with respect to industrial noise sources) is of course a major topic of R & D in acoustics.
The acoustic R & D works carried out by the human resources of ITS, passed for some, or topical for others, are founding ITS's business approach in the field of soundproofing, based on the development of solutions being proportionate, whose effectiveness is predicted with powerful, reliable and versatile tools. The SILDIS software suite (Sound Impact Limitation: Design for Industrialized Solutions) is the unwavering support of the ITS business.