This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical Design of Loudspeaker Systems in a Car Cabin
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 13, 2018 by SAE International in United States
Annotation ability available
Event: 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
These days loudspeaker systems in vehicles are gaining more and more of importance. Usually quite a few speakers are installed and driven in combination in order to obtain a convincing sound environment for the occupants/customers. Sometimes even a 3D sound experience shall be reached, where up to 20 loudspeakers might become necessary. No doubt that such a number of speakers and their proper placement in the car cabin is a rather challenging task, leading to extensive measurements in different cabin environments.
In the current contribution, it is suggested to simulate the scenario by means of specially combined computer models. These allow not only a rather economic possibility to investigate different changes/variants without expensive new setups but also an additional gain of knowledge.
For the numerical representation of the loudspeaker system a multiphysics approach is needed, namely physical aspects of electromagnetics, structural dynamics, and acoustics have to be considered and combined. Doing so, the different fields might be accounted for by models obeying different levels of detail, where the spectrum might reach from simple 1D approaches to highly detailed 3D models. In view of this, different methodologies such as the finite element method, the boundary element method or energy based formulations need to be coupled. In the current contribution a methodology for the numerical design of loudspeaker systems is developed and discussed by means of representative examples.
CitationZaleski, O., Keuchel, S., and Von Estorff, O., "Numerical Design of Loudspeaker Systems in a Car Cabin," SAE Technical Paper 2018-01-1545, 2018, https://doi.org/10.4271/2018-01-1545.
- Thiele , N. Loudspeakers in Vented Boxes: Part 1 Journal of the Audio Engineering Society 19 5 382 392 1971
- Small , R.H. Closed-Box Loudspeaker Systems-Part 1: Analysis Journal of the Audio Engineering Society 20 10 798 808 1972
- Keuchel , S. , Hagelstein , N. , Zaleski , O. , and von Estorff , O. Evaluation of Hypersingular and Nearly Singular Integrals in the Isogeometric Boundary Element Method for Acoustics Computer Methods in Applied Mechanics and Engineering 325 Supplement C 488 504 2017
- Aretz , M. and Vorländer , M. Combined Wave and Ray Based Room Acoustic Simulations of Audio Systems in Car Passenger Compartments, Part I: Boundary and Source Data Applied Acoustics 76 82 99 2014
- Beranek , L. and Mellow , T. Acoustics: Sound Fields and Transducers Elsevier Science 2012
- Morse , P.M. and Ingard , K.U. Theoretical Acoustics Princeton University Press 1968
- S. Keuchel , K. Vater , O. von Estorff Hp Fast Multipole Boundary Element Method for 3d Acoustics International Journal for Numerical Methods in Engineering 110 9 2017 842 861
- S. Keuchel J. Biermann , O. von Estorff A Combination of the Fast Multipole Boundary Element Method and Krylov Subspace Recycling Solvers Engineering Analysis with Boundary Elements 65 2016 136 146