Industrial noise control is a necessity, in particular in relation to two problems which, in certain contexts, can be cumulative:
- the protection of workers from noise: this is a health issue, as exposure to excessively high noise levels is likely to cause irreversible hearing trauma that involves premature hearing loss.
In the European Union, Directive 2003/10 /CE of February 6, 2003 concerns the minimum safety and health requirements relating to the exposure of workers to the risks due to physical agents (noise); transposed into French law (cf. Decree n ° 2006-892 of July 19, 2006 relating to safety and health requirements applicable in the event of exposure of workers to risks due to noise and modifying the labor code), it provides that a daily noise exposure level greater than 80 dB (A) and/or a peak sound pressure level above 135 dB (C), are above the limits triggering the action
- preservation of the noise environment: this is a question of respecting the tranquility of residents, too high noise levels being such as to create discomfort in the neighborhood.
In France, an emergence value i.e. the difference between the A-weighted equivalent continuous pressure levels of ambient noise (industrial installation in operation) and residual noise (in the absence of noise generated by the industrial installation but measured on its period of activity) above some defined limits constitutes in particular an offense (cf. Environmental Code) - depending on the ambient noise level 5 or 6 dB (A) during the day and 3 or 4 dB (A) during the night -.
Industrial noise control (measurements, studies and works) is at the heart of the activity of Isolation Technologie Services (ITS).
Indeed, industrial noise control requires an analysis of the situation in terms of acoustics, based on measurements of sound levels, and, when the admissible thresholds are exceeded, the definition of appropriate means for reducing noise emissions for incriminated noise sources (e.g. soundproof buildings, sound enclosures, silencers, lagging) or the limitation of sound propagation (e.g. acoustic screens, noise barriers), which constitutes the basic know-how of ITS.
Whatever the context, industrial noise control equipment (soundproofing devices) can be studied, sized and/or marketed (with or without installation) by Isolation Technologie Services (ITS), taking into account (all) the constraints, variable from one project to another: aerodynamics & ventilation, thermal, resistance of materials, fire behavior, dimensional limitations, applicability of standards and calculation codes (possibly: local), possible ways for on-site intervention.