"Direct Validation of Computational Acoustic Results for Automotive Cabin Simulations" Moderated by Roger Shively
"Direct Validation of Computational Acoustic Results for Automotive Cabin Simulations"
This event will be moderated by our very own Roger Shively, who is also the Automotive Pillar Chair for the APEI, now known as the Audio Product Development Alliance (APDA). He will moderate, and participate in both presentations, because these topics relate heavily to what SAI does: the simulation, visualization, tuning, and auralization using these tools.
Roger recently moderated the APEI Automotive Audio section of the AES Fall Show in October of this year, as pictured.
The mission of the APEI Automotive Pillar is to explore and explain the practical approach and development of all the products that are conceived, planned, designed, and implemented in automotive car audio. They plan to hold an online session for Automotive Audio every month, so stay tuned for our second session in February 2021.
Mads Herring Jensen
Session 1
Modeling strategies and techniques in car cabin acoustics
with Mads Herring Jensen
Simulation and virtual models play an important role in the integration of sound systems into the car cabin environment as well as their calibration. In this session we will look at various modeling approaches and techniques used when assessing these systems. The low to mid frequency behavior is captured with a full wave models, while the high frequency behavior is typically captured with ray acoustics techniques. Emergence of new numerical methods and improved hardware shifts the frequency at which ray techniques are applied. We will also discuss boundary conditions as well as source characterization.
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. You can find COMSOL’s website here.
Christof Faller
Session 2
Visualizing, Tuning, and Auralizing Car Cabin Simulation Results
with Christof Faller
A useful method for visualizing the results from an FEA or Ray Tracing models is discussed. Impulse response information is taken directly from a simulation model or generated from amplitude and phase result and imported into an Illusonic tool for reviewing time and frequency data for each point in the results file. For automotive, the number of results point could be microphones set in an array for each listening position. The results data can be grouped for review and comparison to measured data for the purpose of model updates. They can also be grouped and averaged for a virtual equalization as well as auralization. This process will be reviewed and demonstrated.
Christof Faller received an M.S. (Ing.) degree in electrical engineering from ETH Zurich, Switzerland, in 2000, and a Ph.D. degree for his work on parametric multichannel audio coding from EPFL Lausanne, Switzerland, in 2004. From 2000 to 2004 he worked in the Speech and Acoustics Research Department at Bell Labs Lucent and its spin-off Agere Systems, where he worked on audio coding for satellite radio, MP3 Surround, and the MPEG Surround international standard. He is currently managing director at Illusonic, a company he founded in 2006. You can find his website here.
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