Real-time Microphone Array Processing for Sound-field Analysis and Perceptually Motivated Reproduction

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Journal Title
Journal ISSN
Volume Title
Sähkötekniikan korkeakoulu | Master's thesis
Date
2017-12-11
Department
Major/Subject
Acoustics and Audio Technology
Mcode
ELEC3030
Degree programme
CCIS - Master’s Programme in Computer, Communication and Information Sciences (TS2013)
Language
en
Pages
7+54
Series
Abstract
This thesis details real-time implementations of sound-field analysis and perceptually motivated reproduction methods for visualisation and auralisation purposes. For the former, various methods for visualising the relative distribution of sound energy from one point in space are investigated and contrasted; including a novel reformulation of the cross-pattern coherence (CroPaC) algorithm, which integrates a new side-lobe suppression technique. Whereas for auralisation applications, listening tests were conducted to compare ambisonics reproduction with a novel headphone formulation of the directional audio coding (DirAC) method. The results indicate that the side-lobe suppressed CroPaC method offers greater spatial selectivity in reverberant conditions compared with other popular approaches, and that the new DirAC formulation yields higher perceived spatial accuracy when compared to the ambisonics method.
Description
Supervisor
Pulkki, Ville
Thesis advisor
Delikaris-Manias, Symeon
Keywords
spatial audio, microphone arrays, sound-field analysis, sound-field reproduction, directional audio coding, time-frequency domain processing
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Citation