Enhanced wide-area low-frequency sound reproduction in cinemas: effective and practical alternatives to current calibration strategies

Hdl Handle:
http://hdl.handle.net/10545/611819
Title:
Enhanced wide-area low-frequency sound reproduction in cinemas: effective and practical alternatives to current calibration strategies
Authors:
Hill, Adam J.; Hawksford, Malcolm O. J.; Newell, Philip
Abstract:
The current strategies for the low-frequency calibration of cinema sound systems are based on a flawed premise of low-frequency acoustics and psychoacoustics. This research shows that there is virtually no benefit in terms of spatiotemporal variance reduction: pre- and post-calibrated systems will exhibit equally position-dependent listening experience differences. For modern cinemas, the typical focus on room-modes when designing a low frequency calibration system is not necessary because the dimensions of the space coupled with low reverberation time results in Schroeder frequencies around 35 Hz. Above this value, effects of room-modes are not perceptible. Comb-filtering between sources and low-order reflections is the primary cause of high spatial variance. Furthermore, there is no evidence that spatial averaging techniques used for measurement and equalization are subjectively beneficial. A new approach needs to be invented.
Affiliation:
University of Derby; University of Essex; Acoustic Consultant
Citation:
Hill, Adam J.; Hawksford, Malcolm O. J.; Newell, Philip. (2016) "Enhanced Wide-Area Low-Frequency Sound Reproduction in Cinemas: Effective and Practical Alternatives to Current Calibration Strategies". Journal of the Audio Engineering Society, vol. 64, issue 5, pp. 280-298. May.
Publisher:
Audio Engineering Society
Journal:
Journal of the Audio Engineering Society
Issue Date:
May-2016
URI:
http://hdl.handle.net/10545/611819
DOI:
10.17743/jaes.2016.0012
Additional Links:
http://www.aes.org/e-lib/browse.cfm?elib=18134
Type:
Article
Language:
en
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorHill, Adam J.en
dc.contributor.authorHawksford, Malcolm O. J.en
dc.contributor.authorNewell, Philipen
dc.date.accessioned2016-06-06T13:17:51Z-
dc.date.available2016-06-06T13:17:51Zen
dc.date.issued2016-05-
dc.identifier.citationHill, Adam J.; Hawksford, Malcolm O. J.; Newell, Philip. (2016) "Enhanced Wide-Area Low-Frequency Sound Reproduction in Cinemas: Effective and Practical Alternatives to Current Calibration Strategies". Journal of the Audio Engineering Society, vol. 64, issue 5, pp. 280-298. May.en
dc.identifier.doi10.17743/jaes.2016.0012-
dc.identifier.urihttp://hdl.handle.net/10545/611819-
dc.description.abstractThe current strategies for the low-frequency calibration of cinema sound systems are based on a flawed premise of low-frequency acoustics and psychoacoustics. This research shows that there is virtually no benefit in terms of spatiotemporal variance reduction: pre- and post-calibrated systems will exhibit equally position-dependent listening experience differences. For modern cinemas, the typical focus on room-modes when designing a low frequency calibration system is not necessary because the dimensions of the space coupled with low reverberation time results in Schroeder frequencies around 35 Hz. Above this value, effects of room-modes are not perceptible. Comb-filtering between sources and low-order reflections is the primary cause of high spatial variance. Furthermore, there is no evidence that spatial averaging techniques used for measurement and equalization are subjectively beneficial. A new approach needs to be invented.en
dc.language.isoenen
dc.publisherAudio Engineering Societyen
dc.relation.urlhttp://www.aes.org/e-lib/browse.cfm?elib=18134en
dc.subjectAudioen
dc.subjectAudio engineeringen
dc.subjectLoudspeakersen
dc.subjectAcousticsen
dc.subjectCinema sounden
dc.subjectPsychoacousticsen
dc.subjectOptimisationen
dc.titleEnhanced wide-area low-frequency sound reproduction in cinemas: effective and practical alternatives to current calibration strategiesen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentUniversity of Essexen
dc.contributor.departmentAcoustic Consultanten
dc.identifier.journalJournal of the Audio Engineering Societyen
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