Analyse, Resynthese und Interpolation von KFZ-Innengeräuschen

Diplomarbeit (Acrobat Reader 1.512 KB), September 2000

The aim of this work is to develop a realtime simulator für the interior noise of a car for varying load situations. Using this simulator laboratory hearing tests which are common in the automotive industry may be executed more realistically than by using recorded sounds without any interaction with the test person. Given run-up and slow-down signals for various accelerator pedal positions, it should be possible to interpolate between these prerecorded signals to obtain signals for other load situations. A simplified model for the load situation is defines as a two dimensional paramter space for each gear, with the parameters velocity (PRM) and the position of the accelerator pedal. Choosing a suitable signal model, the signal can be considered as a sum of a deterministic and a stochastic component. Various signal models and methods for the decomposition of deterministric and stochastic components are examined, e.g. SMS, QUASAR, Heterodyne Filter, Additive Synthese or LPC. A Vold-Kalman tracking filter was realizes by using the preconditiones conjugate gradient method.