J. Phys. IV France
Volume 04, Numéro C5, Mai 1994
3ème Congrés français d'acoustique
3rd French conference on acoustics
Page(s) C5-225 - C5-228
3ème Congrés français d'acoustique
3rd French conference on acoustics

J. Phys. IV France 04 (1994) C5-225-C5-228

DOI: 10.1051/jp4:1994544

Modélisation basses fréquences d'un haut-parleur électrodynamique


Laboratoire d'Acoustique de l'Université du Maine, URA 1101 du CNRS, Avenue Olivier Messiaen, BP. 535, 72017 Le Mans cedex, France

Although many methods are commonly available to get the Thiele-Small parameters of electrodynamic loudspeakers, the need to obtain a greater resolution and a good robustness led us to develop a method based on an analytical estimation of statistical values of these parameters, using a minimum number of measurements at arbitrary frequencies. The increased resolution obtained permitted us to point out some phenomena related to the heating of the suspension, and occuring during the aging of drivers. An iterative process applied to our method has also given a good estimate for another parameter related to the viscoelasticity of the suspension. This aspect is shown to be correlated to the material used for the cone surround, and may be responsible of some discrepancies observed between the parameter values obtained from different methods.

© EDP Sciences 1994