A comparison of different loudspeaker models to empirically estimated non-linearities

摘要: This paper investigates and questions the suitability of modelling non-linear loudspeaker distortion with scalar diagonal (SD) Volterra series. approach, popular in studies acoustic echo cancellation (NAEC), is compared to an alternative non-scalar (NSD) model. The new model estimated empirically but based on theoretical underpinnings convolution. Using common, real-speech test signals, outputs synthesised by each are evaluated objectively through their comparison real measured controlled conditions. Results show that NSD better reflects empirically. We also NAEC experiments conducted SD models have potential over-exaggerate performance, whereas those reflect practical performance.