Speaker
Description
An important aspect of loudspeaker development is understanding how structural geometry and material properties influence the small-signal frequency response and directivity. This question can be answered by the use of numerical methods such as FEA, which approximate the solution of the governing partial differential equations by solving their weak variational form over a discretised computational domain. However, commercial FEM software remains expensive and offers limited flexibility for customization. This paper presents LoudPy, an open-source Python-based simulation framework that models asymmetrical loudspeakers by coupling a FEM formulation for the acoustic and mechanical domains with a lumped-element model for the electrical circuit. Validation against COMSOL simulations demonstrates agreement within <1 % of relative error across the studied frequency range. Key results include small-signal pressure frequency responses, pressure field maps, and a complex eigenvalue analysis, establishing LoudPy as an accessible and reliable alternative for loudspeaker acoustic modeling.