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Development of a head-movement-aware signal capture system for the prediction of acoustical spatial impression

Kim, C, Mason, R and Brookes, T (2010) Development of a head-movement-aware signal capture system for the prediction of acoustical spatial impression In: 20th International Congress on Acoustics, 2010-08-23 - 2010-08-27, Sydney, Australia.

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Abstract

This research introduces a novel technique for capturing binaural signals for objective evaluation of spatial impression; the technique allows for simulation of the head movement that is typical in a range of listening activities. A subjective listening test showed that the amount of head movement made was larger when listeners were rating perceived source width and envelopment than when rating source direction and timbre, and that the locus of ear positions corresponding to the pattern of head movement formed a bounded sloped path – higher towards the rear and lower towards the front. Based on these findings, a signal capture system was designed comprising a sphere with multiple microphones, mounted on a torso. Evaluation of its performance showed that a perceptual model incorporating this capture system is capable of perceptually accurate prediction of source direction based on interaural time and level differences (ITD and ILD), and of spatial impression based on interaural cross-correlation coefficient (IACC). Investigation into appropriate parameter derivation and interpolation techniques determined that 21 pairs of spaced microphones were sufficient to measure ITD, ILD and IACC across the sloped range of ear positions.

Item Type: Conference or Workshop Item (Paper)
Additional Information: This is an electronic version of a paper published as Kim C, Mason R, Brookes TS (2010). Development of a head-movement-aware signal capture system for the prediction of acoustical spatial impression. 20th International Congress on Acoustics, Sydney, Australia, 23 Aug 2010 - 27 Aug 2010. Editors: Burgess M, Don C. Proceedings of the 20th International Congress on Acoustics. International Congress of Acoustics (ICA), Sidney. 4: 2768-2775. Available online at: http://www.acoustics.asn.au/conference_proceedings/ICA2010/cdrom-ICA2010/index.htm
Related URLs:
Divisions: Faculty of Arts and Human Sciences > School of Arts > Sound Recording
Depositing User: Symplectic Elements
Date Deposited: 25 Sep 2012 14:28
Last Modified: 23 Sep 2013 19:35
URI: http://epubs.surrey.ac.uk/id/eprint/712915

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