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dc.contributor.authorMoore, Jonathan B.
dc.contributor.authorHill, Adam J.
dc.date.accessioned2018-11-23T13:37:58Z
dc.date.available2018-11-23T13:37:58Z
dc.date.issued2018-11-16
dc.identifier.citationMoore, J.B., and Hill, A.J. (2018) ‘Dynamic diffuse signal processing for sound reinforcement and reproduction’, Journal of the Audio Engineering Society, 66 (11), pp.953-965. doi: 10.17743/jaes.2018.0054en
dc.identifier.issn0004-7554
dc.identifier.doi10.17743/jaes.2018.0054
dc.identifier.urihttp://hdl.handle.net/10545/623149
dc.description.abstractHigh inter-channel coherence between signals emitted from multiple loudspeakers can cause undesirable acoustic and psychoacoustic effects. Examples include position-dependent low-frequency magnitude response variation, where comb-filtering leads to the attenuation of certain frequencies dependent on path length differences between multiple coherent sources, lack of apparent source width in multi-channel reproduction and lack of externalization in headphone reproduction. This work examines a time-variant, real-time decorrelation algorithm for the reduction of coherence between sources as well as between direct sound and early reflections, with a focus on minimization of low-frequency magnitude response variation. The algorithm is applicable to a wide range of sound reinforcement and reproduction applications, including those requiring full-band decorrelation. Key variables which control the balance between decorrelation and processing artifacts such as transient smearing are described and evaluated using a MUSHRA test. Variable values which render the processing transparent whilst still providing decorrelation are discussed. Additionally, the benefit of transient preservation is investigated and is shown to increase transparency.
dc.description.sponsorshipN/Aen
dc.language.isoenen
dc.publisherAudio Engineering Societyen
dc.relation.urlhttp://www.aes.org/e-lib/browse.cfm?elib=19871
dc.subjectAudio engineeringen
dc.subjectLoudspeakersen
dc.subjectDigital signal processingen
dc.subjectPsychoacousticsen
dc.titleDynamic diffuse signal processing for sound reinforcement and reproduction.en
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalJournal of the Audio Engineering Societyen
dc.internal.reviewer-note08/11/18 NYP SER http://www.aes.org/journal/search/en
html.description.abstractHigh inter-channel coherence between signals emitted from multiple loudspeakers can cause undesirable acoustic and psychoacoustic effects. Examples include position-dependent low-frequency magnitude response variation, where comb-filtering leads to the attenuation of certain frequencies dependent on path length differences between multiple coherent sources, lack of apparent source width in multi-channel reproduction and lack of externalization in headphone reproduction. This work examines a time-variant, real-time decorrelation algorithm for the reduction of coherence between sources as well as between direct sound and early reflections, with a focus on minimization of low-frequency magnitude response variation. The algorithm is applicable to a wide range of sound reinforcement and reproduction applications, including those requiring full-band decorrelation. Key variables which control the balance between decorrelation and processing artifacts such as transient smearing are described and evaluated using a MUSHRA test. Variable values which render the processing transparent whilst still providing decorrelation are discussed. Additionally, the benefit of transient preservation is investigated and is shown to increase transparency.


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