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Compact spherical loudspeaker arrays: new filter and layout ideas

Authors Riedel, S.
Year 2018
Thesis Type Master's thesis
Topic Spatial Audio
Abstract Compact spherical loudspeaker arrays employ modal beam forming techniques to precisely excite wall reections. In its performance practice it turned out that it is mostly the horizontal plane, in which walls and reectors are close enough to create distinct auditory objects in space. Moreover, human sound localization is known to be more precise in the horizontal plane. This motivates the development of mixed-order control and dedicated mixed-order arrays that concentrate their loudspeakers in the horizontal plane. Furthermore, this thesis presents a two-band approach for the control of spherical loudspeaker arrays. In the lower band, spherical beamforming is feasible and fast crosstalk-cancellation lters can be designed. In the higher band, where beamforming is impaired due to spatial aliasing and uncontrolled interferences between the loudspeakers, an amplitude panning approach based on AllRAD is employed.
Supervisors Zotter, F.