Enhanced wide-area low-frequency sound reproduction in cinemas: effective and practical alternatives to current calibration strategies
Journal article
Authors | Hill, Adam J., Hawksford, Malcolm O. J. and Newell, Philip |
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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. |
Keywords | Audio; Audio engineering; Loudspeakers; Acoustics; Cinema sound; Psychoacoustics; Optimisation |
Year | 2016 |
Journal | Journal of the Audio Engineering Society |
Publisher | Audio Engineering Society |
Digital Object Identifier (DOI) | https://doi.org/10.17743/jaes.2016.0012 |
Web address (URL) | http://hdl.handle.net/10545/611819 |
hdl:10545/611819 | |
Publication dates | 19 May 2016 |
Publication process dates | |
Deposited | 06 Jun 2016, 13:17 |
Contributors | University of Derby, University of Essex and Acoustic Consultant |
File | |
File | File Access Level Open |
https://repository.derby.ac.uk/item/946v2/enhanced-wide-area-low-frequency-sound-reproduction-in-cinemas-effective-and-practical-alternatives-to-current-calibration-strategies
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