Research

Services

Well-being is central to the challenges of sustainable construction. Whether considering a building or its urban environment, exposures and hazards are numerous. They are related to a number of physiological and environmental factors, such as exposure to physical, chemical and microbiological pollutants and the perception of thermal, noise, vibration and light discomfort. The CSTB conducts research to characterize and predict exposure in buildings and their environments and guides the design and development of solutions to protect people and ensure safe and comfortable environments.

Indoor air quality

Our services

  • Assistance with implementing indoor air quality monitoring
  • Assessment and monitoring of air contaminants (biological and physicochemical): search for sources, analysis of ventilation conditions
  • Analysis of pollutant transfer between ground and buildings
  • Consulting on the protection of buildings from ground-level gaseous pollutants (radon, SSP)
  • Assistance with developing and assessing technological solutions for air purification, microbiological decontamination and indoor air quality monitoring
  • Consulting on the health safety of building products and systems
  • Detecting and monitoring mold in buildings (fungal biodetector)

Methodology

  • Large scale in situ measurement campaigns (regional and national)
  • Building audits: ventilation, physicochemical pollution, biocontamination
  • Full-scale measurement campaigns in controlled environments
  • Database management and statistical analysis of operational feedback
  • Numerical simulation of ventilation conditions (airflow and hydrothermal properties)
  • Product characterization: emissions, adsorption and reactivity of pollutants

Technological platforms

Laboratories:

  • Microbiological risk management
  • Applied virology
  • Physics of aerosols (particle emissions of products)
  • Bacteriology and mycology
  • Assessment of volatile organic compound (VOC) emissions
  • Mobile microbiology laboratory (prevention of Legionnaire’s disease)
  • MARIA experimental house
  • ASTERIA realistic test environment

Projects

Diya One robot

Designed by Partnering Robotics, the Diya One robot helps improve indoor air quality in...

Fungal biodetector

The CSTB has developed an innovative detector to monitor fungal contamination in...

Lum'Air®

R&D at the OQAI (Indoor Air Quality Observatory): development of an instrument to...

Air quality measurement

Assessment protocols and large-scale data gathering on air quality, comfort and...

Hydrocarbon pollution

Ventilation appraisal and diagnosis of hydrocarbon pollution following the contamination...

Characterization of VOC emissions

Assessment of the sanitary impact of construction and decoration products: example of a...

Specification of low-emission products

Diagnosis and specification for furnishing materials with low emissions, in response to...

Bio-sampling system

Development of a system for sampling biological contaminants to monitor airborne...

Commercial purifying systems

Assessment of the efficiency and safety of commercial air treatment and purifying...

See all the completed projects

Acoustics and environmental vibrations

Our services

  • Modeling of noise sources and propagation of sound waves outdoors at all scales (streets, neighborhoods, cities, long distances)
  • Prediction of noise exposure and soundscape quality
  • Optimized design of innovative, complex acoustic devices (noise barriers, diffusers, etc.)
  • 3D audio rendering of complex sound environments (indoor and outdoor)
  • Acoustic performance of materials, building components and structures
  • Sound quality of complex interior spaces (vehicle interiors, offices, performance halls, museums, etc.)
  • Study of environmental vibration propagation and coupling with buildings
  • Performance of antivibration devices (for train rails, building structures, etc.)
  • Prediction of structure-borne noise

Methodology

  • Assistance with technical communication and dissemination
  • Development of specific prediction tools and simplified engineering methods
  • Consultancy using advanced prediction tools (quantitative and qualitative restitution – realistic 3D sound rendering)
  • In situ assessment (measurement campaigns)
  • Development of specific test benches
  • MICADO: prediction of acoustic reflection, absorption and diffraction effects.
    MICADO is a numerical solution based on the boundary element method (BEM). It is used for accurate prediction of sound propagation close to obstacles that have arbitrarily complex geometries, for any material, such as innovative noise protections.
  • MEFISSTO: vibration propagation in the ground and in structures.
    MEFISSTO is a numerical solution for calculating the propagation of vibrations in the ground and structures. It is based on finite element (structures) and boundary elements (propagation in the ground) methods. It can be used to size vibration reduction systems for buildings or predict surface vibration caused by the pass-by of trains in tunnels.
  • MithraSON: simulation of soundscapes.
    MithraSON is a unique tool capable of realistic 3D audio rendering of any outdoor sound environment. Any source can be integrated: industrial and city noise, traffic, etc. It is possible to navigate in real time through a reconstructed environment to assess the impact of various facilities by listening to the audio rendering.
  • ATMOS: atmospheric effects on sound propagation over long distances.
    ATMOS predicts the acoustic impact over long distances, up to several kilometers, for all types of exterior noise sources (ground transportation, industry and even wind turbines). This tool quantifies the influence of weather conditions (including wind profile and direction), nature and shape of the ground, and even obstacles, such as noise barriers, on perceived noise levels far from sources.
  • ICARE: acoustic simulation.
    ICARE is a solution of acoustic propagation using asymptotic methods in complex 3D environments. This tool has a broad range of applications, especially in the transportation industry, and can be used for instance to guarantee good intelligibility in vehicle interiors.
  • AcouSPACE: acoustic simulation in complex indoor environments
    AcouSPACE has been developed to assist acoustic consultants and guarantee the acoustic performance of complex interior spaces, such as open-plan offices. This tool predicts the standard criteria used in acoustic quality (mentioned in ISO 3382 NF S31-199, etc.).
  • AcouBAT: prediction of the acoustic performance of buildings.
    AcouBAT assesses insulation from airborne sound, impact noise, and equipment noise in buildings. Ideal for integrating acoustics from the start of projects, it helps optimizing the performance, whether as part of a regulatory framework, quality approach (Qualitel, HQE/LEED/BREEAM certification) or unique specifications.
  • AcouSYS: prediction of the acoustic performance of systems.
    AcouSYS predicts the acoustic performance of systems in use in buildings and in the transportation industry (automotive, aeronautics and railways). The transfer matrix method is combined in this software with spatial windowing to include the finite dimensions of systems. The acoustic performance of components can be optimized in terms of sound-insulation, noise impact level and acoustic absorption.
  • MithraSIG: acoustic mapping at the urban scale
    MithraSIG predicts environmental noise in urban and rural areas (traffic, railways, industry, worksites, etc.). It is based on a rapid ray tracing method combined with a powerful spatial information system (SIS) to perform acoustic impact studies, as well as strategic large-scale noise mappings.
  • Carmen
    Carmen is an electroacoustic system based on an active virtual wall principle that adapts a room’s acoustics to the type of performance. This system was designed to produce marked variability while maintaining the most natural acoustic effects possible. In many cases, it is the ideal solution to correct problematic acoustics in venues.

Technological platforms

LABE: European Laboratory of Building Acoustics
  • Measurements of the acoustic properties of building components (absorption, sound insulation, structure-borne sound, rain noise level, etc.) using standardized methods
  • Characterization of the acoustic properties of porous materials (airflow resistance, porosity, etc.)

Projects

Urban soundscape model

Study of the sound environment of a pedestrian square on Cours Lafayette in Lyon using...

Study of sound-absorbing tiles over the A6B highway

Optimization of the design of sound-absorbing tiles by numerical simulation using the...

Acoustic efficiency of train noise barriers

Using the MICADO software package, the CSTB was able to calculate noise reduction on...

OSCAR Interface

Starting from the ICARE software package, the CSTB developed the OSCAR calculation...

Under-hood noise and exterior propagation

Development of a calculation module for congested spaces, especially applied to noise...

Reactor noise

Resolving the masking effect of plane fuselages on the noise coming from the reactors....

CARMEN® system in Le Mans

The CSTB designed and installed the CARMEN® system for active control of...

Sound-insulation of timber frame walls

Analysis of the acoustic performance of innovative timber-framing processes, by a...

Sandwich panels for verandas

Study and performance optimization of a range of ECOSTA type sandwich panels. To begin, a...

Flooring acoustics

Definition of vibration insulation of building junctions of a lightweight flooring...

Acoustics of a thermal bridge break

Ouest Armatures wanted to evaluate the effect of a thermal bridge break on the acoustic...

BY-OASIS

The By-OASIS tool is a noise simulator which makes it possible to anticipate and control...

See all the completed projects

Projects

Vibrations and structure-borne noise of tunnel-boring machines

Development of technical specifications to measure vibrations generated by a...

Dynamic stiffness of resilient sleeper pads

Steering of a campaign to measure the dynamic stiffness of a new type of resilient...

See all the completed projects

Lighting and electromagnetism

Our services

  • Characterization and optimization of artificial lighting systems for visual comfort
  • Characterization and optimization of the use of natural lighting
  • Optimization of the energy consumption of lighting installations
  • Assistance in the development of industrial lighting sources
  • Development of occupancy sensors (infrared lenses)
  • Prediction of radio frequency waves exposure in urban settings and buildings (mobile phones, Wi-Fi, etc.)
  • Characterization of the electromagnetic performance of products and radiation of light sources

Methodology

  • PHANIE: prediction of lighting environments.
    PHANIE is a physical lighting solution, capable of processing highly complex scenes. Right from the design phase of a room or building, this software can define and visualize lighting scenarios, depending on multiple parameters: architecture, natural lighting sources and climate, lamps and light fixtures and type of materials. It also processes exterior scenes, including assessment of problems and optimization of urban street lighting, characterization and optimization of solar potential and determination of the impact of large structures on sunlight levels.
  • ICARE-RF: 3D electromagnetic simulation in complex environments.
    ICARE-RF is a simulation tool for electromagnetic propagation using asymptotic methods in complex 3D environments. This tool can also be used to optimize the placement of antennas in crowded spaces (inside building, on ship superstructures, etc.) and predict the exposure of individuals in those spaces.
  • MithraREM: mapping of exposure to radio frequency waves at the urban scale.
    This software predicts the electromagnetic exposure from existing or future radio transmitters; such as cell phone antennas at the city scale. MithraREM uses high-performance algorithms based on ray tracing asymptotic methods, combined with a powerful geographical information system (SIS).

Technological platforms

  • Lamp characterization facility – goniophotometer in close and far field (Nantes/Grenoble)
  • Bidirectional Reflectance Distribution Function (BRDF) measurement facility (Nantes)
  • Phéline platform (Grenoble): electromagnetic compatibility, measurement of radiation from ultra-high frequency (UHF) anechoic chamber sources

Projects

Mapping of exposure to electromagnetic waves

Characterization of indoor exposure to electromagnetic waves inside an airport terminal,...

Infra-red lens

Contribution to the development of new infra red detectors for Legrand: numerical study...

Wuhan train station

The CSTB was contacted by the AREP consulting firm to assist in the design of artificial...

A320 assembly plant

Airbus called on the CSTB to study and optimize the artificial lighting in the A320...

Philharmonie de Paris

Experimental: wind loading and comfort study on a 1/200 scale model The Philharmonie de...

See all the completed projects

Climatic comfort

Our services

  • Characterization of pedestrian comfort and safety in urban wind
  • Aerodynamic solutions for pedestrian comfort
  • Characterization and optimization of indoor ventilation
  • Characterization of the performance of green features (vertical and rooftop gardens)
  • Characterization of comfort and hygrothermal risk
  • Assistance with the design of intelligent systems for controlling thermal and aerothermal comfort in vehicle interior

Methodology

  • Characterization of wind comfort through measurement campaigns (models and in situ)
  • Digital simulation: wind flow around structures, humidity, temperature and airflow in buildings
  • Expert use of climate databases
  • MATHIS: dynamic predictive tool for temperature and airflow
    MATHIS is a predictive tool that uses a nodal model for calculating the dynamic changes to climatic physical quantities in buildings (temperature, pressure, airflow, humidity) based on external data (wind, temperature, etc.). The effectiveness of ventilation systems and natural ventilation can be studied with this tool.

Technological platforms

Projects

Avignon TGV station

Assessment of the climatic comfort of the new TGV station in Avignon, both inside the...

Les Halles canopy roof

Experimental: wind loading on the 1:200 scale model of the building and 1:50 model of the...

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Perceived and subjective analysis of comfort and environmental hazards

Our services

  • Multicriteria assessment of comfort
  • Analysis and objective documentation of comfort, well-being and discomfort perceived or felt in any environment
  • Determination of the influence of individual and social factors on environmental comfort and well-being
  • Analysis of uses, and identification of change management processes
  • Analysis and psychosocial management in crisis situations (sick building syndrome, etc.)

Methodology

  • Psychological and physiological analyses for sensory studies of comfort (objective documentation of subjective feelings using correlation with physiological response to any type of stimulation)
  • Biophysical measurements (infrared thermography of the face, cutaneous microcirculation, etc.) applied to the physiological responses of the body
  • Conduct and analysis of surveys using questionnaires and interviews
  • Mental mapping
  • Use of databases for statistical purposes

Projects

Multidisciplinary management of a mass psychogenic illness in a school

The CSTB used its expertise to intervene in a case of sick building syndrome in a school....

Skin behavior

Study to understand the behavior of human skin when subjected to strong thermal...

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