Acoustic treatment: 3 complementary levers for maximum performance
In industrial and tertiary environments where noise is a critical issue, acoustic treatment requires more than the application of a single technique. Efficiency is based on a combined approach, integrating insulation, absorption and decoupling. These three levers, when precisely articulated, guarantee optimal, lasting sound attenuation.
Insulation: blocking sound transmission
Acoustic insulation aims to limit the passage of sound waves from one space to another. It relies on high-mass materials (concrete, steel, special glazing) and multi-layered mass-spring-mass walls. Over and above the choice of materials, performance depends on thewatertightness of junctions: Acoustic doors, peripheral joints, thresholds and hoppers must be treated with precision.
A point often underestimated: a leak of just 2 mm at the threshold of an acoustic door can result in a loss of up to 40 dB of attenuation. In practice, perimeter sealing is just as decisive as material density. Careful acoustic sizing and controlled installation are essential to guarantee the desired levels of insulation.
Absorb: reduce reverberation
The aim ofacoustic absorption is to limit reverberation and lower sound levels within a volume. Acoustic absorption materials (mineral wools, technical foams, perforated panels with plenum) convert part of the sound energy into heat, reducing internal reflections.
The result: a significant improvement in speech intelligibility, acoustic comfort and safety (perceptible sound alert). In technical rooms, workshops, sewage treatment plants or data centers, absorption reduces thediffuse field effect and contributes to overall noise reduction, while remaining compatible with ventilation and airflow when Acoustic Louvers and ventilation silencers are used.
Uncoupling: neutralizing vibrations
Acoustic decoupling limits solid-borne transmissions. It consists in decoupling vibratory sources and structures by means of flexible supports, springs, silent blocks or elastomer pads. When properly specified, these devices prevent mechanical vibrations from propagating through the structure and converting into radiated noise through the walls.
This approach is essential for industrial machines, generators, compressors, blowers and motors: by controlling natural frequencies (modal analysis) and transmission paths, we can significantly reduce noise transmitted by structures and protect equipment from mechanical fatigue.
Groupe Boët acoustic engineering
Groupe Boët systematically integrates these three levers into its industrial acoustic solutions: industrial silencers (engine silencers, compressor silencers, booster silencers), Acoustic enclosures, Acoustic panels, Acoustic doors and Acoustic grilles. Each solution is designed using a complete engineering approach: acoustic studies, acoustic simulation, aeraulic calculations(CFD) and structural dimensioning.
Projects are carried out within a quality framework certified ISO 9001, ISO 19443, EN 15085, ASME, RCC-M, CODAP and CODETI. These high standards are underpinned by our long-standing experience (over 150 years of cumulative expertise within the Group) and our mastery of constrained environments: nuclear industry, energy, petrochemicals, pharmaceuticals, food processing, technical buildings and ICPE industrial sites.
A typical example is industrial acoustic enclosures, which combine heavy wall insulation, absorption by porous materials and decoupling by anti-vibration supports. The whole system preserves aeraulic performance thanks to ventilation silencers and guarantees acoustic compliance, while facilitating maintenance and architectural integration.
Combining the three levers for optimum efficiency
Insulation, absorption and decoupling are three complementary approaches, inseparable from sustainable performance in noise control. Their combination, driven by rigorous engineering and verification testing, enables us to achieve ouracoustic attenuation objectives without compromising safety, ventilation or operation.
Do you have a project requiring reliable, certified acoustic control? Contact Groupe BOËT for a personalized study and the deployment of customized solutions: acoustic silencers, acoustic enclosures, acoustic protection panels and equipment.