You are invited to join us at COMSOL Day Montreal for a day of minicourses, talks by invited speakers, and the opportunity to exchange ideas with other simulation specialists in the COMSOL community.
View the schedule for minicourse topics and presentation details. Register for free today.
Build a sound foundation for your modeling work. This demonstration will illustrate best practices for the entire workflow in COMSOL Multiphysics® through geometry creation, setting up your physics, meshing, solving, and postprocessing the results.
Modeling of the Vibroacoustic Behavior of Hearing Protectors Using the Finite Element Method
One of the reasons why hearing protectors are not fully efficient at protecting against noisy environments is the discomfort they induce. This discomfort may incite an individual to wear his protector incorrectly or to remove it, thereby reducing its performance. Of specific interest is the auditory discomfort that depends on the acoustic pressure value at the eardrum of the protected ear. To reduce this discomfort efficiently, a tool for the acoustical design of the hearing protector device (HPD) that allows for the prediction of the frequency spectrum of the acoustic pressure in the ear canal is useful. This is a complicated issue that requires accounting for all of the sound transmission paths (e.g., airborne and structure-borne) within the head, hearing system, and HPD system. This involves solving coupled exterior and interior problems where incoming external sound waves or internally generated sound interacts with an HPD made up of various solid, poroelastic, and acoustical domains coupled to tissues with complex behavioral laws. In this presentation, we show how the finite element approach can be helpful in predicting and understanding the vibroacoustic frequency behavior of open ears and ears occluded by HPDs such as earmuffs and earplugs, with the aim of optimizing their comfort. In particular, the use of the COMSOL Multiphysics® software to solve models of various complexities is considered and discussed. Simulation results are compared with experimental data, analytical models, and other numerical softwares.
Learn how to convert a model into a custom app using the Application Builder, which is included in the COMSOL Multiphysics® software. You can upload your apps to a COMSOL Server™ installation to access and run the apps from anywhere within your organization.
Get a quick overview of using the CFD Module and Heat Transfer Module within the COMSOL® software environment.
Explore the capabilities of COMSOL Multiphysics® for electromagnetics in the static and low-frequency regime with a focus on the AC/DC Module.
Learn about the meshing techniques that are available to you in the COMSOL Multiphysics® software. We will introduce you to basic meshing concepts, such as how to tweak the meshing parameters for unstructured meshes. More advanced topics include working with swept meshes and creating mesh plots.
Learn about modeling high-frequency electromagnetic waves using the RF Module, Wave Optics Module, and Ray Optics Module.
Learn the fundamental numerical techniques and underlying algorithms related to linear and nonlinear multiphysics simulations. We will cover the difference between iterative and direct solvers as well as the different study types including stationary, transient, and eigenfrequency analysis.
Get a brief overview of using the Acoustics Module and Structural Mechanics Module within the COMSOL® software environment.
Institut Robert Sauvé en Santé et Sécurité du Travail Dr. Franck Sgard has a joint PhD in mechanical engineering from the University of Sherbrooke and Institut National des Sciences Appliquées in Lyon, France. As a professor at Ecole Nationale des Travaux Publics de l’Etat, he taught acoustics and developed research activities in acoustics applied to the transportation and building industries, with topics like the design of high-efficiency acoustical materials for sound absorption and insulation, modeling of homogeneous and heterogeneous porous materials, modeling of complex multilayered structures at low frequencies, and characterization of mechanical parameters of porous materials. He now works at the Institut Robert Sauvé en Santé et Sécurité du Travail as the mechanical and physical risk prevention research field leader. His research interests are related to various problems involving noise and vibration in the occupational health and safety field. He has coauthored a book and published more than 170 papers and conference proceedings.