Analysis and Identification of Nonlinear Acoustic Damping in Miniature Loudspeakers

Nonlinear acoustic damping is a key nonlinearity in miniature loudspeakers when the air velocity at high amplitude. Measurement of nonlinear beneficial for predicting and analyzing performance loudspeakers. However, general measuring methods impedance, such as standing-wave tube method or impedance method, are not applicable this scenario because coupled with other system nonlinearities. In study, measurement based on identification was constructed to address issue. The first theoretically analyzed then an equivalent circuit model (ECM) describe full dynamics Based ECM model, identified using measured electrical data compared theoretical calculations. satisfactory agreement between calculations confirms validity proposed method.