Areas of research
Hearing protection devices
Devices dedicated to auditory protection or assistance are usually inserted into the auditory canal (earplugs and hearing aids) or cover the entire ear (acoustic earmuffs). Their use, and therefore, their effectiveness, is severely limited by the discomfort associated with wearing them. The main objective of this research theme is to improve these devices.
This theme also includes the study of active devices that allow for continuous dosimetry, objective acoustic attenuation measurement in real-time, health monitoring and in-ear biosensing intended to serve as a brain-computer interface.
Materials and meta-materials
This research theme focuses on studying the propagation of acoustic and vibrational energy in complex environments (e.g.: architectural, porous or non-linear materials) with a view to developing innovative materials for reducing noise and vibrations.
The most common fields of application include aeronautics, aerospace, automobile, energy production, health and construction.
Sources and transmission paths
The objective of this research theme is to improve techniques for localizing noise sources and to understand the mechanisms for generating and transmitting vibrational and acoustic energy through structures.
GRAM is also interested in the non-linear dynamic behaviour (shock, high excitation amplitude) of structures or systems in the working environment that transmit vibrations to the entire body and that may result in back pain, including suspension seats.
Environmental noise
Environmental noise is defined as noise from all sources with the exception of workplace noise. Urban populations are mainly exposed to noises generated by transportation, construction sites, fixed sources, recreational activities and neighbourhood sources that are capable of causing health problems and/or discomfort.
The objective of the research projects conducted at GRAM is to develop tools for reducing the impact of noise on the health of exposed populations and for improving their acoustic environments.