Thesis

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Schallquellenpositionierung mit Hilfe des Zeitumkehrspiegels

Authors Csonka, I.
Year 2006
Thesis Type Diploma thesis
Topic Spatial Audio
Keywords Wiedergabetechnik
Abstract “Time Reversal Mirror” is a particularly in medical science approved method to focus sound energy at certain points within an arbitrary volume in space. Since the wave equation contains time as derivative of second order, the sound pressure p(r,t) as well as p(r,-t) describe a solution. Thus the wave equation can be considered as invariant against time reversal. This diploma thesis explores the potentials and limits of the Time Reversal Mirror with respect to the use in room acoustics. By comparing simulations and real measurements of the time reversed soundfield we come to conclusions about the focusing of soundwaves, like the effect of super-resolution and the efficiency of certain array arrangements. A real-time realization will finally be implemented in PD to position sound sources by means of the Time Reversal Mirror.
URL http://phaidra.kug.ac.at/o:11031
Supervisors Sontacchi, A.