Sound source reconstruction using inverse boundary element calculations 
 Abstract  Whereas standard boundary element calculations focus on the forward problem of computing the radiated acoustic field from a vibrating structure, the aim of the present work is to reverse the process, i.e., to determine vibration from acoustic field data. This inverse problem is brought on a form suited for solution by means of an inverse boundary element method. Since the numerical treatment of the inverse source reconstruction results in a discrete illposed problem, regularisation is imposed to avoid unstable solutions dominated by errors. In the present work the emphasis is on Tikhonov regularisation and parameterchoice methods not requiring an error norm estimate for choosing the right amount of regularisation. We demonstrate that the Lcurve criterion is robust with respect to the errors in real measurement situations.  Type  Technical report  Year  2001  Publisher  Informatics and Mathematical Modelling, Technical University of Denmark, DTU  Address  Richard Petersens Plads, Building 321, DK2800 Kgs. Lyngby  Series  IMMTR20018  Electronic version(s)  [ps]  BibTeX data  [bibtex]  IMM Group(s)  Scientific Computing 
