Optimization of Electrodynamic Loudspeaker-Design Parameters by Using a Numerical Calculation Scheme

Electrodynamic loudspeaker-design parameters are studied by using a recently developed modeling scheme for the numerical simulation of magnetomechanical transducers. This simulation scheme is based on a Finite-Element-Method (FEM) and allows the precise and efficient calculation of the magnetic, mechanical and acoustic fields including their couplings. Therewith, the complex dynamic behavior of moving coil drivers can be studied and, furthermore, an appropriate computer-aided-design including an optimization of critical parameters can be established.

In the present paper the validity of the simulation models is, first, verified by comparing computed and measured results. The calculated results show good agreement with the measured data. Furtheron, two practical applications, the elimination of response dips at intermediate frequencies and the improvement in efficiency for higher frequencies, are presented.