COMSOL Day: Acoustics

May 6, 2020 8:30 AM - 4:30 PM

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Join us for a full day of acoustics modeling news and discussions. You will hear about how modeling is being used by experienced leaders in your industry. You will also gain insight into the latest acoustics research in academia. Upcoming projects, challenges, and focuses within acoustics simulation will be at the center of discussion.

COMSOL will present on acoustics modeling with COMSOL Multiphysics®. There will be demo and support stations where you can discuss your modeling needs with COMSOL technical staff.

The final program will be announced within the next few weeks. Register for free today.

Schedule

8:00
Registration
8:30
COMSOL Presentation
9:00

Vibroacoustic Simulation and Optimization of Hearing Aids

Hearing aids are complex vibroacoustic systems and inherently require the use of multiphysics to be modeled and simulated. The hearing aid includes a receiver (a microspeaker) as well as one or several microphones. Both acoustic and vibrational feedback paths exist between the two. Via the use of simulations, engineers can better track the effects coming from the different forces, torques, and acoustic pressures, and an optimized design can be found for a given hearing aid situation. This will be demonstrated, as well as some emerging techniques in the field of shape and topology optimization — all kept within the framework of COMSOL Multiphysics® exclusively.

9:20

Diffuse Sound Field

Creating a diffuse sound field in reverberation rooms entails a number of prerequisites, such as multiple sources, careful setup of both equipment and deflecting panels, and subsequently some postprocessing. An attempt to do the same in effectively one go using finite element modeling is presented, and simulated results are compared to real measured values.

9:40
Coffee Break
10:00
Parallel Session
Ultrasound & NDT

Get an overview of the capabilities for modeling the propagation of acoustic waves in coupled fluid and solid media in the COMSOL® software. The applications include nondestructive testing (NDT) units, flowmeters, and piezoelectric transducers.

Material Properties

High-fidelity numerical simulations are only achieved if material properties are well described. In acoustics, knowing the damping properties of fluids and structures can be challenging. For porous materials, the challenge may be even higher, as data provided by manufacturers is often sparse. Using COMSOL Multiphysics®, it is possible to estimate your material parameters from experimental measurements through optimization. Moreover, the properties of any gas mixture, like moist air, can be computed from first principles with thermodynamics.

11:05

Simulation of Sound Field Control Technologies in Automotive Listening Spaces

The future of automotive audio systems is expected to introduce profound changes in both the user's perception of and expectations to transportation, as well as in the physical boundaries of the listening space. To address these new conditions, the investigation of emerging technologies is aided by the mathematical modeling of physics. In this presentation, examples are shown of different aspects of the research approach involving acoustical simulations that come before the technology development process.

11:25
Invited Speakers
11:45
Break for Lunch
12:45
Parallel Session
Loudspeakers

The virtual multiphysics development, design, and optimization of loudspeakers has reached a very mature state within the last five years. You will learn about the capabilities and latest modeling approaches available in COMSOL Multiphysics®, which will allow you to have a full virtual testing environment.

Microacoustics

Acoustic propagation in structures with submillimeter features is the norm in consumer products like mobile devices, protective grills of loudspeakers, hearing aids, and perforates used in muffler systems. Common to all is that the inclusion of thermoviscous losses is essential to correctly predict the response. You will be introduced to the modeling techniques used to capture these effects in simulations.

13:50
Invited Speakers
14:10
Invited Speakers
14:30
Break
14:45
Parallel Session
Optimization and Product Design

Sensitivity analysis can be used to identify important parameters that can then be changed manually or automatically using optimization. Optimization of these parameters enhances the performance of your product. In the case of manufacturing uncertainties, it is possible to compute several objectives and optimize for the worst of them. You will see several examples of how optimization can be set up in the COMSOL® user interface.

Acoustics Simulation in the Automotive Industry

Simulations are heavily used in many application areas in the automotive industry, ranging from cabin acoustics and muffler design to the vibrational analysis of components in an NVH setting. You will learn how you can use acoustics simulations in these various application areas. The focus will be on multiphysics phenomena like acoustic-structure interaction (ASI) and convected acoustics.

15:45
Closing Remarks

COMSOL Speakers

Thure Ralfs
COMSOL
Thure Ralfs is the managing director of COMSOL's Danish office. Before joining COMSOL in 1997, he worked with various technical software. Thure has an MSc and MBA from the Technical University of Denmark.
Mads J. Herring Jensen
COMSOL
Mads Herring Jensen joined COMSOL in 2011 and is the technical product manager for the Acoustics Module. Before starting at COMSOL, he worked in the hearing aid industry for five years as an acoustic finite element expert. Mads has a PhD in computational fluid dynamics from the Technical University of Denmark.
Andres Garcia
COMSOL
Andres Garcia joined COMSOL in 2019 as a development engineer for the Acoustics Module. Before joining COMSOL, he worked as a simulation expert in various automotive and aerospace companies. Andres holds an MS from the Technical University of Madrid.
Kirill Shaposhnikov
COMSOL
Kirill Shaposhnikov works at COMSOL as a development engineer in the acoustics group. He has a degree in applied mathematics from South-Russian State Polytechnic University and a PhD in mechanical engineering from the Vienna University of Technology. His interests focus on applied mathematics, mathematical physics, and numerical analysis.

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COMSOL Day Details

Location

TIVOLI HOTEL & CONGRESS CENTER
Arni Magnussons Gade 2
Copenhagen 1577
Directions

Invited Speakers

Martin Olsen
Harman International Lifestyle

Martin Olsen is employed as a senior principal engineer, at Harman International - Lifestyle, where he works in the field of automotive acoustical research and technology development. His present research areas include spatial sound field control utilizing arrays of loudspeakers and microphones in the automotive domain, numerical modeling, and virtual acoustics.

Lars Lindemose
Brüel & Kjær Sound & Vibration Measurement A/S

Lars Lindemose has worked in the audio industry for 10+ years and has done mathematical modeling of speakers at Analog Devices and audio driver design at Libratone. He presently works with Brüel & Kjær Sound & Vibration Measurement A/S as a development engineer of acoustic transducers.

René Christensen
GN Hearing

René Christensen is a senior specialist at GN Hearing and holds a PhD in microacoustics in hearing aids. He has worked in the field of computational vibroacoustics for around 15 years with a focus on such products as loudspeakers and hearing aids, but also with a focus on the academic side of the modeling of physical phenomena and collaborating with professors and students in Denmark and internationally. In recent years, he has worked toward making shape and topology optimization more approachable for the industry in general.