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- W2744364080 abstract "Multi-point approaches for sound field control generally sample the listening zone(s) with pressuremicrophones, and use these measurements as an input for an optimisation cost function.A number of techniques are based on this concept, for single-zone (e.g. least-squares pressurematching (PM), brightness control, planarity panning) and multi-zone (e.g. PM, acoustic contrastcontrol, planarity control) reproduction. Accurate performance predictions are obtained when distinctmicrophone positions are employed for setup versus evaluation. While, in simulation, onecan afford a dense sampling of virtual microphones, it is desirable in practice to have a microphonearray which can be positioned once in each zone to measure the setup transfer functionsbetween each loudspeaker and that zone. In this contribution, we present simulation results overa fixed dense set of evaluation points comparing the performance of several multi-point optimisationapproaches for 2D reproduction with a 60 channel circular loudspeaker arrangement. Variousregular setup microphone arrays are used to calculate the sound zone filters: circular grid, circular,dual-circular, and spherical arrays, each with different numbers of microphones. Furthermore, theeffect of a rigid spherical baffle is studied for the circular and spherical arrangements. The resultsof this comparative study show how the directivity and effective frequency range of multi-pointoptimisation techniques depend on the microphone array used to sample the zones. In general,microphone arrays with dense spacing around the boundary give better angular discrimination,leading to more accurate directional sound reproduction, while those distributed around the wholezone enable more accurate prediction of the reproduced target sound pressure level." @default.
- W2744364080 created "2017-08-17" @default.
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- W2744364080 date "2017-07-01" @default.
- W2744364080 modified "2023-09-27" @default.
- W2744364080 title "Comparison of microphone array geometries for multi-point sound field reproduction" @default.
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