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Analyse, Resynthese und Interpolation von KFZ-Innengeräuschen

Authors Feldbauer, C.
Year 2000
Thesis Type Diploma thesis
Topic Audio Signal Processing
Keywords technical acoustics
Abstract The aim of this work is to develop a realtime simulator for 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 persons. 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 defined as a two dimensional parameter space for each gear, with the parameters velocity (RPM) 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 deterministic and stochastic components are examined, e.g. SMS, QUASAR, Heterodyne Filter, Additive Synthese or LPC. A Vold-Kalman tracking filter was realized by using the preconditioned conjugate gradient method.
Supervisors Höldrich, R.