Networking, Career Building, and Doing Business are BIG Features at AISE. BUT…
CONTENT IS KING!
AISE education content has been internationally recognized as top notch and cutting edge. On this page we will give a glimpse of the content coming to AISE2019. It will be updated weekly as new submissions come in so check back often.
Note that we will break it down by category and type; Business Content, Technical Content, and Advertorials. Seminars are 1 hour or more. Papers are 20 to 30 minutes. Tracks are several hours to full day with various types of content. You’re going to want to be here!
Our content is broken down by the following classifications:
Seminars- 1 hour or more academic only content
Papers- 20 to 30 minutes academic only content
Advertorials- 20 to 30 minutes to discuss products and services from a sponsoring company or individual
Forum- Panel or Round Table discussion about issues, technology, or education content
Speaker Builders Workshop (SBW) will be a full day track with several presenters on June 10, 2019. Content Abstracts are presented in order of submission. This track will have content for ALL phases of business, management, technical content, and marketing. The goal is to show the production path of a new speaker product from conecption to post production testing.
Using COMSOL Multiphysics® for Loudspeaker Designs (Seminar)
Speaker: Jinlan Huang, Ph.D., Applications Engineer, COMSOL, Inc., Burlington, MA
Abstract: In this workshop we are going to demonstrate how you can use COMSOL Multiphysics® to simulate a generic loudspeaker driver provided by Eminence and the sound field it generates, a complicated multiphysics problem that involves solving Magnetic Fields, Solid Mechanics, and Pressure Acoustics as well as the interaction between them. The comprehensive multiphysics model has been packaged into an app with customized interface using the Application Builder, a built in feature within COMSOL Multiphysics®, for the attendees to download during the class and change some design variables (such as cone thickness, cone material, or coil parameters etc.) to see how they affect the performance of the loudspeaker for frequencies of interest. We’ll conclude with a brief overview of the acoustic and vibration modeling capabilities inside COMSOL, especially in the areas of electroacoustic transducers including loudspeakers and microphones.
Material Parameter Identification (Seminar)
Speakers: Stefan Irrgang and Stephan Shonfeld
Abstract: Still fighting with agreement of your FEA simulation with reality? Ever since the finite element analysis has been around (and along with it its huge promise for prognosis and parameter study in early design phases), audio engineers have been struggling to ensure agreement of their simulation results with physical reality.
One central reason for this is connected to the insecurity to determine correct elastic material parameters (Young’s modulus and damping) for assembled components of the transducer – eg: cone, surround and dustcap. Traditionally, these parameters are retrieved either from data tables or from measurements on flat-sheet raw-materials. Neither of these could cover the significant changes in elastic material properties that components suffer during the individual manufacturing process of machining, forming, gluing and assembly. This uncertainty in input parameters to FEA has hitherto affected the accuracy of its results severely. Trial-and-error methods of tuning material parameters by hand in the FE model could only improve this to a limited extent.
This contribution will introduce a novel approach to accurately determine the optimal frequency-dependent (complex-valued) effective material parameters for all diaphragm and surround components. Starting with laser-measurements on an assembled transducer, we will demonstrate the process on a real-life industry application case and discuss consequences on general modelling approaches. The significant increase in accuracy of structural FE results that this new methodology provides – both in terms of simulated vibration patterns, directivity and frequency response – can have huge impact on the process of transducer design as a whole, imposing interesting potential to cut in on physical prototyping and move more design-loops to the virtual domain. Obvious advantages include reduced time to market and F&E expenses, while at the same time improving the design result. The demonstration will be held in cooperation with COMSOL.
COMSOL Multiphysics (Advertorial)
Speaker: Jinlan Huang
In this talk, we will give an overview on the capabilities of COMSOL Multiphysics in loudspeaker simulation to different level of complexities. A specific model example will be presented when a full transient analysis of a loudspeaker driver is performed.
The analysis accounts for nonlinear behavior of the soft iron in the magnetic system, geometric nonlinearities in the structures, and nonlinear effects due to the topology change when the voice coil is moving in and out of the magnetic gap. The model uses the moving mesh feature and automatic remeshing to capture the topology changes and the movement of the voice coil.
The output includes the total harmonic distortion (THD) and the dynamic BL curve. The model also describes how to calculate the intermodulation distortion (IMD).
Thermal Benefits of Ferrofluid in Loudspeakers (Paper)
Speaker: Vanessa Rene
Abstract: The first commercial use of ferrofluid in loudspeakers was 45 years ago, in 1973. Since that time, the market has grown to more than 300 speaker manufacturers around the world using Ferrotec ferrofluids. In annual numbers, there are over 300,000,000 speakers benefitting from the use of ferrofluid for heat transfer, damping, enhanced linearity (centering) to reduce field failures and decrease distortion. Ferrofluid has been utilized by some of these customers now for 30+ years. This presentation will focus on the significant ability of ferrofluid to increase heat transfer, allowing for speakers to expand their performance limits and/or insure long-term integrity.