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Investigation into and modelling of head movement for objective evaluation of the spatial impression of audio

Kim, C, Mason, R and Brookes, T (2010) Investigation into and modelling of head movement for objective evaluation of the spatial impression of audio In: 159th Meeting of the Acoustical Society of America, 2010-04-19 - 2010-04-23, Baltimore, USA.

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Research was undertaken to determine the nature of head movements made when judging spatial impression and to incorporate these into a system for measuring, in a perceptually relevant manner, the acoustic parameters which contribute to spatial impression: interaural time and level differences and interaural cross‐correlation coefficient. First, a subjective test was conducted that showed that (i) the amount of head movement was larger when evaluating source width and envelopment than when judging localization and timbre and (ii) the pattern of head movement resulted in ear positions that formed a sloped area. These findings led to the design of a binaural signal capture technique using a sphere with multiple microphones, mounted on a simulated torso. Evaluation of this technique revealed that it would be appropriate for the prediction of perceived spatial attributes including both source direction and aspects of spatial impression. Reliable derivation of these attributes across the range of ear positions determined from the earlier subjective test was shown to be possible with a limited number of microphones through an appropriate interpolation and calculation technique. A prototype capture system was suggested as a result, using a sphere with torso, with 21 omnidirectional microphones on each side. [Work supported by the Engineering and Physical Sciences Research Council (EPSRC), UK, Grant No. EP/D049253.]

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Faculty of Arts and Social Sciences
Authors :
Kim, C
Mason, R
Brookes, T
Date : March 2010
DOI : 10.1121/1.3384695
Contributors :
ContributionNameEmailORCID Society of America,
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 15:27
Last Modified : 31 Oct 2017 15:02

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