Distortion Analyzer - a New Tool for Assessing and Improving Electrodynamic Transducer

摘要

The dominant nonlinear distortions in loudspeakers, headphones and otheractuators are predictable and are closely related with the general principle, particulardesign, materials and assembling techniques applied to the transducer. The DistortionAnalyzer uses novel system ident$cation techniques to measure the large signal parametersof the expanded loudspeaker model, the instantaneous state signals and the distortioncomponents generated by each nonlinearity. This information is crucial for assessing theperformance of transducer in the large signal domain as well as for ftnding the physicalcauses of the distortion to improve the transducer in respect with sound quality, weight, sizeand cost.