May 25, 2021 10:30 a.m.–3:45 p.m. EDT

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COMSOL Day: Acoustics

See what is possible with multiphysics simulation

Join us for a full-day online event with a special focus on acoustics. You will have the opportunity to meet with COMSOL technical staff and customers from around the world, engage in product demonstrations, and gain insight into upcoming projects and focuses within acoustics research and industry.

Topics include the analysis of loudspeakers, ultrasound and non-destructive testing (NDT), microacoustics, room acoustics, vibrations, as well as convected acoustics. We will also address topics like optimization, meshing, and solving of large acoustic models. During the presentations you will be encouraged to ask questions. Engineers from COMSOL will be able to answer and present best practices.

Feel free to invite your colleagues. View the schedule below and register for free today!

Schedule

11:00 a.m.

To start, we will briefly discuss the format of the day and go over the logistics for using GoToWebinar.

11:15 a.m.

During this session, you will get an introduction to the latest news and trends in acoustics simulation. We will also briefly discuss some of the future developments and ideas for the Acoustics Module.

11:45 a.m.
Parallel Sessions
Microacoustics

Acoustic propagation in structures with submillimeter physical features is common in the components of consumer products like mobile devices, protective grills of loudspeakers, hearing aids, and perforates used in mufflers and sound insulation. To model this accurately, you need to include thermoviscous losses in your definition of the physics. In this session, you will be introduced to modeling techniques used to capture these effects and how to model nonlinear effects in microacoustics systems.

Introduction to the Acoustics Module

In this session, we will introduce key features within COMSOL Multiphysics® and the Acoustics Module and discuss how to solve the acoustic wave equation in order to model sound generation, propagation, absorption, and attenuation. The key features will be demonstrated by building a simple model, from applying the physics and properties of the system to the different ways to postprocess the results.

12:15 p.m.
Q&A/Break
12:30 p.m.
Parallel Sessions
Noise and Vibration

Noise and vibration analysis covers areas from ground-borne noise and noise generated by machinery to the analysis of feedback in electroacoustics applications. The physics involved in such applications deal with the combined propagation and interaction of elastic waves in structures and pressure waves in fluids. In this session, you will learn how to model these phenomena through several examples and demonstrations.

Convected Acoustics

The analysis of acoustic phenomena in the presence of background mean flow is often referred to as convected acoustics or flow-borne noise. Applications include jet engine noise, mufflers, and perforates, all including the presence of a background flow. This session will introduce the aeroacoustics capabilities of COMSOL Multiphysics® and demonstrate examples of convected acoustics.

1:00 p.m.
Q&A/Break
1:15 p.m.
Break
1:45 p.m.

Join us for a discussion with leading industry experts on how they are using simulation in general, and COMSOL Multiphysics® in particular, in the development of innovative audio products.

Moderator: Scott Leslie, Audio Product Education Institute (APEI) chair

Panelists:

  • Geoffrey Christopherson, Harman Professional
  • Tim Whitwell, Tectonic Audio Labs
  • Ulrik Skov, Facebook Reality Labs
  • Lakshmikanth Tipparaju, Dolby Laboratories
2:20 p.m.
Q&A/Break
2:30 p.m.
Parallel Sessions
Ultrasound and NDT

A large number of applications involve the modeling of ultrasonic wave propagation in fluids and solids. This includes nondestructive testing (NDT), flowmeters, and ultrasound equipment in medical processes. During this session, you will be introduced to strategies for modeling such phenomena in COMSOL Multiphysics®, from the behavior of piezoelectric transducers to the nonlinear propagation of finite-amplitude ultrasonic waves in fluids.

Room Acoustics

Acoustic propagation in rooms, halls, car cabins, and other enclosed yet definitive spaces falls within the field of room acoustics. In this session, you will learn how acoustic behavior and response from the features in a room can be modeled in COMSOL Multiphysics® using both ray tracing and full-wave models, in some cases combined with each other. This feature is useful when defining submodels of, for example, a treated wall or absorber, in order to compute the angle-dependent absorption, which is then used in a ray tracing model for the room as a whole.

3:00 p.m.
Q&A/Break
3:15 p.m.
Parallel Sessions
Loudspeakers

The design and optimization of loudspeakers is a challenging multiphysics problem that requires various numerical approaches, depending on the accuracy required and the complexity of the system. This can range from lumped electroacoustics models in the frequency domain to nonlinear transient analyses of total harmonic distortion. In this session, you will receive insight into the modeling techniques available for loudspeaker simulations as well as appropriate postprocessing tools that provide you with a fully virtual testing environment.

Solvers and Solving Large Models

When solving large acoustics models, it can be beneficial to tune the solvers by considering performance, stability, and memory consumption. A good strategy with respect to meshing and other modeling options is also important. This session will illustrate the process, from choosing one of the predefined solver suggestions in COMSOL Multiphysics® as a starting point to determining how the solver settings can be manipulated and tuned for robust modeling of acoustics phenomena.

3:45 p.m.
Q&A/Break
4:00 p.m.
Concluding Remarks

COMSOL Speakers

Mina Sierou
Technical Account Manager, Acoustic Devices
Mina Sierou joined COMSOL's Los Angeles office in 2004. Prior to joining COMSOL, she received her PhD in chemical engineering from Caltech in 2001 and spent a couple of years in Cambridge, England doing postdoctoral research.
Lauren Sansone
Marketing and Events Director
Lauren Sansone is the marketing and events director at COMSOL, Inc. and has been with COMSOL since 2006. She is responsible for the global event marketing of COMSOL Days, the COMSOL Conference, exhibitions, and training.
Mads J. Herring Jensen
Technology Manager, Acoustics
Mads Herring Jensen joined COMSOL in 2011 and is the technology manager for the acoustics products. Mads has a PhD in computational fluid dynamics from the Technical University of Denmark. Before joining COMSOL, he worked in the hearing aid industry for five years as an acoustic finite element expert.
Kirill Shaposhnikov
Senior Developer, Acoustics
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.
Jinlan Huang
Lead Applications Engineer
Jinlan Huang is an applications engineer for vibrations and acoustics and instructs acoustics training courses. She received her PhD from Boston University, Department of Aerospace and Mechanical Engineering, investigating acoustic wave propagation in complex-tissue environments and ultrasound-induced tissue heating and bleeding control. She joined COMSOL in 2011.
James Gaffney
Applications Engineer
James Gaffney works at COMSOL as an applications engineer for acoustics. He studied acoustical engineering at the University of Southampton, where he also earned his doctorate degree. His research involved predicting the fuselage installation effects from engine fan tones with analytical methods.
Jacob Yström
Technology Director
Jacob Yström is the technology director of numerical analysis at COMSOL. He has been the lead developer for the solver technology at COMSOL since 2005. He received his PhD in numerical analysis from the Royal Institute of Technology, Stockholm.

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COMSOL Day Details

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May 25, 2021 | 10:30 a.m. EDT (UTC-04:00)
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Invited Speakers

Tim Whitwell
Tectonic Audio Labs

Tim Whitwell is a physicist and acoustic engineer with over 20 years of experience in loudspeaker research and development as well as transducer and system design. He specializes in electro-acoustic design, simulation, and measurement; electromagnetic and multiphysics finite element analysis; distributed mode loudspeaker (DML) design; balanced mode radiator (BMR) design; laser vibrometry; and audio system tuning. His designs have sold in the hundreds of millions and won many prestigious awards, including What Hi-Fi Product of the Year (twice). Furthermore, Tim is the cited inventor on a number of technology and audio patents.

Lakshmikanth Tipparaju
Dolby Laboratories

Lakshmikanth Tipparaju is a sr. acoustic system and transducer engineer at Dolby Laboratories in San Francisco, where he has been working since 2018. At Dolby, his role focuses on simulation-driven development of acoustic systems and transducers for developing innovative acoustic hardware solutions to help expand the adoption of Dolby Atmos® in consumer products, and he has contributed to the development of ultra-thin Dolby Atmos® Enabled Speaker technology. Prior to Dolby, he worked as a simulation engineer within the Audio R&D group at Samsung Research America, focusing on FEM modeling of loudspeaker drive units and enclosures. Lakshmikanth holds two patents in loudspeaker technology and has authored several papers on simulation-driven loudspeaker development. He received his master of science degree from Arizona State University.

Ulrik Skov
Facebook Reality Labs

Since 2018, Ulrik Skov heads FRL’s Acoustic Render/Speaker Group. He is an acoustic industry veteran with 25+ years of experience, including hearing instruments (Oticon); transducer development (Tymphany – ScanSpeak, Vifa, and Peerless); and consumer product acoustic module design (Apple – HomePod, AirPods, iPad, and iPhone).

The Acoustic Render Group is an integrated part of the Technology Engineering Devices (TED) Audio team. The group architect, design, and optimize acoustic transducers, modules, materials, and systems. The group impact and influence the creation and shipping of innovative category-defining consumer hardware products and redefine the way people connect by getting the job done building frictionless “social first audio”, bringing the world closer together, nevertheless the form factor, such as AR|Glasses, VR|Oculus, and Home&Work|Portal.

The Acoustic Render Group heavily front-load and democratize decision making by simulation-driven working methods and processes via high-fidelity digital twins used throughout the development from early discovery/incubation to late design tweaks. The DigiTwins solve for best user experience as a complex cross-functional tradeoff, considering form factor, acoustic performance, power consumption, tuning, cost, and reliability.

This performance-focused approach is centered on COMSOL Multiphysics®'s linear and nonlinear capabilities within the areas of vibroacoustics, thermalacoustics, visco-/hyperelastics, and electromagnetics.

Aggressive computational loads are handled by an internally built High Performance Compute Platform, where individual engineers have on-the-fly access to queueless and unlimited virtual clusters to collapse mainly 3D multiphysics computation burdens and timelines.

Geoffrey Christopherson
Harman Professional

Geoffrey Christopherson is a professional audio veteran with 15 years of product development history at Harman Professional. He has primarily worked for the record, broadcast, and tour sound applications and products and holds a patent for a self-calibrating loudspeaker system. Geoffrey received his BS in electrical engineering from the University of Southern California in 2000 with a minor in music recording.

Scott Leslie
Audio Product Education Institute

Scott Leslie is the Audio Product Education Institute (APEI) managing director; the Audio Engineering Society (AES) product development chair; and chief architect and strategist at PD Squared, a consultancy business focused on improving and redefining product development for the audio industry. PD Squared stands for "Process Development for Product Development Organizations". Scott’s career includes multiple management, engineering, and product management positions with companies including Altec Lansing, JBL Professional (Harman), Renkus-Heinz, Tektronix, and Sun Microsystems. In 2002, Scott founded Evidant Corporation, a company specializing in process analytics and business intelligence that he now also leads as chief architect. Scott holds a bachelor's degree in electrical and electronics engineering from California State Polytechnic University-Pomona, a master's (MSEE) in audio and acoustics from Georgia Institute of Technology, and an MBA in operations research and statistics from the University of California, Irvine — The Paul Merage School of Business.