Loudspeaker systems, for example in vehicles or living areas, are of great importance in today's everyday life. In most cases, several speakers are used in combination to achieve a sound that fills the room as much as possible. Systems with more than 20 loudspeakers can even be used to create 3D sound. To design and analyze such systems, measurements are usually required in the respective environments. A simulation of the scenarios in the computer allows additional knowledge to be gained and is a cost-effective way of investigating different changes/variants. Validation of the simulations is necessary in order to be able to make reliable statements. In addition to the large number of loudspeakers, the respective environment poses a major challenge.
An acoustics laboratory with half-space conditions is available at the Institute for Modeling and Calculation to validate an acoustic simulation. This allows the investigation of loudspeaker chassis with different loudspeaker enclosures. The measuring system then offers the possibility of recording the sound pressure and detecting the bi-directional influence on the structure with the aid of accelerometers. The coupling between the structure (vehicle body, loudspeaker enclosure) and the air cavity (listening position) plays a major role here.
A multi-physical simulation must be carried out for the numerical mapping of loudspeaker systems. The areas of electromagnetism, structural dynamics and acoustics must be combined. The individual areas can be mapped with different levels of detail, with the possibilities ranging from analytical 1D approaches to very detailed 3D models. Accordingly, different methods such as the finite element method, the boundary element method or energy-based methods must be coupled with each other.
The Institute for Modeling and Computation at the TUHH conducts research in this highly interdisciplinary field together with Novicos GmbH. Various topics for Bachelor's, Master's or project work are possible.
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