ASSESSMENT OF ELECTROMECHANICAL SYSTEM NONLINEAR RESPONSE IN TIME DOMAIN

Results of recent development in the design of fullrange driver units fulfill criteria of an average consumer, especially oriented into frequency domain. Frequency range of full range driver unit is usually extended on the expense of the dynamic range. Fullrange loudspeakers designed according to such criteria tend to have diameters of less than 6˝. Due to their small size they perform long excursions; therefore they are prone to nonlinear distortions. Few methods were developed for identification and quantification of individual types of nonlinear distortions. They all use well known test signals and extensive digital signal processing, especially transformations from time domain into frequency domain and vice versa. Only few researchers observed nonlinear distortions in time domain, however they all used well established test signals. Therefore we propose a different test signal which enables very fast and lucid identification of nonlinear distortions from signals in time domain. Additional simulations were performed to test the applicability of the proposed approach.