Positions Effect of Multi Exciters and the Optimization on Sound Pressure Responses of Distributed Mode Loudspeaker
The exciters of distributed mode loudspeaker (DML) mainly play two roles, activating forces and attached masses, both of which will affect the sound pressure response of the panel. Therefore, to derive a smoother sound pressure response, the positions of the exciters should be considered carefully. In this paper, the model of a panel with activating forces and attached masses is developed with partial differential equations (PDEs) in FEMLAB. The optimized positions of the exciters are given combining the use of genetic algorithm (GA) based on two different optimization criteria, sound pressure response and mode distribution. Optimal results in both cases are derived and show that various optimization criteria lead to different sound decays and sound pressure sensitivities.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.