Dynamic diffuse signal processing for sound reinforcement and reproduction.
Journal article
Authors | Moore, Jonathan B. and Hill, Adam J. |
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Abstract | High 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. |
Keywords | Audio engineering; Loudspeakers; Digital signal processing; Psychoacoustics |
Year | 2018 |
Journal | Journal of the Audio Engineering Society |
Publisher | Audio Engineering Society |
ISSN | 0004-7554 |
Digital Object Identifier (DOI) | https://doi.org/10.17743/jaes.2018.0054 |
Web address (URL) | http://hdl.handle.net/10545/623149 |
hdl:10545/623149 | |
Publication dates | 16 Nov 2018 |
Publication process dates | |
Deposited | 23 Nov 2018, 13:37 |
Contributors | University of Derby |
File | File Access Level Open |
File |
https://repository.derby.ac.uk/item/94w43/dynamic-diffuse-signal-processing-for-sound-reinforcement-and-reproduction
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