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Analysis and Synthesis of Sound-Radiation with Spherical Arrays

Authors Zotter, F.
Year 2009
Thesis Type Doctoral thesis
Topic Spatial Audio
Keywords Ambisonics, technical acoustics, wave field synthesis, Wiedergabetechnik, acoustics, Aufnahme- und Wiedergabetechnik
Abstract This work demonstrates a comprehensive methodology for capture, analysis, manipulation, and reproduction of spatial sound-radiation. As the challenge herein, acoustic events need to be captured and reproduced not only in one but in a preferably complete multiplicity of directions, instead. The solutions presented in this work are using the soap-bubble model, a working hypothesis about sound- radiation, and are based on fundamental mathematical descriptions of spherical acoustic holography and holophony. These descriptions enable a clear methodic approach of sound-radiation capture and reproduction. In particular, this work illustrates the implementation of surrounding spherical microphone arrays for the capture of sound-radiation, as well as the analysis of sound-radiation with a functional model. Most essential, the thesis shows how to obtain holophonic reproduction of sound-radiation. For this purpose, a physical model of compact spherical loudspeaker arrays is established alongside with its electronic control.
Supervisors Höldrich, R., Wessel, D.