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

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    Hill, Hawksford, Newell - JAES ...
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    Authors
    Hill, Adam J.
    Hawksford, Malcolm O. J.
    Newell, Philip
    Affiliation
    University of Derby
    University of Essex
    Acoustic Consultant
    Issue Date
    2016-05-19
    
    Metadata
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    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.
    Citation
    Newell, P., Hill, A. J., and Hawksford, M. (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.
    Publisher
    Audio Engineering Society
    Journal
    Journal of the Audio Engineering Society
    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
    ae974a485f413a2113503eed53cd6c53
    10.17743/jaes.2016.0012
    Scopus Count
    Collections
    Department of Mechanical Engineering & the Built Environment

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