Electrodynamic loudspeaker modelling and characterization

The modelling and the simulation software are important tools in the design process of radiator systems. Also, for the manufacturers of such systems their characterization is necessary in the quality control. This work deals with the modelling, the simulation and the characterization of an electrodynamic loudspeaker. The measured characteristics are the electrical complex impedance, the frequency response and the Harmonic Distortions (HD) including 2nd, 3rd and Total Harmonic Distortion (THD). Comparisons of computed and measured frequency response and electrical complex impedance are shown. Thiele-Small parameters are deduced from the electrical complex impedance measurement. Besides these characteristics, the visualization of sound fields is useful for understanding the directional radiation of sound emitted from such loudspeaker. For that, the transverse acoustical beam section of sound pressure field is done using acoustic intensity measurement. Matlab based programs are developed for the simulation of these characteristics and for the processing and the visualization of acoustic pressure field.