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ACOUSTIC WAVES & VIBRATIONS SOLUTIONS

Through its subsidiary Acoustb, Egis offers solutions for controlling noise, vibrations and electromagnetic waves from infrastructure projects, buildings and industrial sites

Acoustb has nearly 21 years’ experience working on highly complex projects, and its teams of highly specialised engineers and technicians mean it can offer its customers solutions to meet their specific needs and circumstances. Acoustb works in all fields of acoustics, vibrations and electromagnetism (metrology, PMC, consulting, engineering, consultation and training):

  • Environmental noise: impact studies (transport infrastructures, mixed development zones, ICPE sites – classified on environmental grounds, and construction sites), qualification of the initial state, modelling (reverse ray tracing, finite elements, complex modelling), acceptance measures, consultations and public meetings
  • Buildings: design as part of a project management team, from the tender until works handover, a PMC service, diagnosis and design of acoustic measures in specific locations (theatre, amphitheatre, vast spaces)
  • Industry: handling of problems specific to the industrial environment, noise pollution in the vicinity and health at the workplace
  • Vibrations: impact studies for vibrations from transport infrastructure (metro, tram, train), risk analysis and structure-borne sound propagation in buildings, research & development (source modelling, ground/structure interaction)
  • Electromagnetism: measurements and calculations of low frequency (power lines and electrical facilities) and high frequency (mobile phone antennas) electromagnetic fields, risk analysis

“Innovation is in Acoustb’s genes” by Maxime Jabier, director of Acoustb:

  • To keep up with the major trends of the building trade, Acoustb has joined a working group – named Adivbois – whose studies focus on timber constructions: “While in instruments, wood produces the sounds adored by music lovers, for timber frame buildings, this material is a sensitive issue that involves a completely new approach to acoustics. Given that we have very little feedback on this topic, we decided set up a specific working group on acoustics and timber constructions.”
  • For line 16 of the Grand Paris Express, Acoustb was tasked with designing the interior and exterior of six stations. Unlike eyes, ears cannot be shut; the brain is always attentive to noise. And since noise is all around us, why not create musical spaces with specially designed acoustics? Imagine introducing sounds other than that of the pinging of the metro doors… For this project, we wanted to go beyond the limitations of the initial specifications, by offering a sensitive auditory experience. Rather than leaving passengers plagued by resonating footsteps or suitcases on wheels dragged along the ground, we devised subtle soundscapes that permeate the endless corridors, without attracting attention.”
  • For the city of Lille, Acoustb responded to two invitations to tender as part of an urban renewal project. The area in question is close to the ringroad and subject to high noise exposure. To ascertain the expectations of residents, Acoustb offered to work with an urban sociologist and geographer, as well as a psycho-acoustics specialist. And not unlike a conductor, Acoustb played the role of systems coordinator. Using sound recordings, Acoustb conducted an auditory mapping of the location, and put forward an initial diagnosis to anticipate future developments and ensure that the sound becomes softer on the ears. Meanwhile, Acoustb also studied the possibility of setting up a multi-use noise barrier. Acoustb opted for solar panels, a water recovery system and greenhouses. ”