Article
Enhancing the maximum sound pressure level of exciter-based sound systems (de)
* Presenting author
Abstract:
Compared to conventional loudspeaker-based sound systems, exciter-based sound systems come with the benefit of smaller packaging, less weight, and close-to-invisible integration – especially when using already existing panels for sound radiation, such as interior trim panels in vehicles, for example. Therefore, replacing or enhancing conventional loudspeaker-based sound systems with exciters is an advantageous approach. Exciter-based sound systems consist of a vibration exciter that is coupled to a sound radiation shell structure. Compared to conventional loudspeakers, where a dedicated membrane radiates the sound, exciter-based sound systems can work with almost any shell structure, such as plastic trim panels, wooden plates, and sheet metal, for example. However, understanding the mechanism of sound excitation and radiation is much more complex for exciter-based sound systems than for conventional loudspeakers. This work presents the fundamentals of exciter-based sound systems and describes some of the most important parameters that influence sound performance. Furthermore, some parameters are identified that influence the maximum achievable sound pressure level.