Title:
Rapid psychophysical calibration using bisection scaling for individualized control of source elevation in auditory display

dc.contributor.author Martens, W. L.
dc.contributor.corporatename International Community for Auditory Display
dc.contributor.corporatename University of Aizu. Multimedia Systems Lab
dc.date.accessioned 2014-03-18T04:26:01Z
dc.date.available 2014-03-18T04:26:01Z
dc.date.issued 2002-07
dc.description Presented at the 8th International Conference on Auditory Display (ICAD), Kyoto, Japan, July 2-5, 2002. en_US
dc.description Presented at the 8th International Conference on Auditory Display (ICAD), Kyoto, Japan, July 2-5, 2002.
dc.description.abstract In an effort to reduce problems stemming from individual differences in spatial hearing, a rapid method for customizing an interactive spatial auditory display for individual users was developed and tested. This paper describes how new users of a DSP-based spatial auditory display system perform a short series of psychophysical calibration tasks via realtime manipulation of the elevation of a virtual sound source removed from the median plane by a constant angle (on a ``cone of confusion'' centered on the interaural axis). The user first produces five settings indicating the point at which the perceived elevation of a virtual source matches their own internal standard for ``ear-level'' incidence. The median of these settings provides an anchoring stimulus for creating an individualized psychophysical scale for controlling source elevation as perceived by the user of the display system. The experimentally-derived anchoring stimulus is regarded as the origin for an angular bisection session that enables the rapid construction of a look up table (LUT) for the full range of elevations produced by the display for each individual user. In contrast to systems that base source elevation control upon individualized head-related transfer functions (HRTFs), the tested system uses a generic set of HRTFs, and manipulates only the values in the LUT for the elevations produced by each HRTF. The method does not attempt to find for each individual listener a single best frequency scaling for the generic set of HRTFs, but attempts to map the useful range of elevations produced by them. Though such a LUT for perceived elevation can be based upon angular estimates made for virtual sources created using each of many HRTFs, the bisection task presented here requires users to complete only a short listening session in which they adjust the elevation of a comparison stimulus to bisect the angle subtended by a pair of reference stimuli. In contrast to other rapid methods of customization, such as those based upon a user's subjective preferences, the current method is based upon active spatial manipulation of a virtual source. The adjustments are referenced to the user's internal standard for ``ear-level'' incidence, which is tangibly defined and quite easily explained to new users. en_US
dc.embargo.terms null en_US
dc.identifier.uri http://hdl.handle.net/1853/51373
dc.publisher Georgia Institute of Technology en_US
dc.publisher Georgia Institute of Technology
dc.publisher.original International Community on Auditory Display en_US
dc.publisher.original International Community for Auditory Display (ICAD)
dc.relation.ispartofseries International Conference on Auditory Display (ICAD)
dc.subject Auditory display en_US
dc.subject Rapid psychophysical calibration en_US
dc.subject Bisection scaling en_US
dc.subject Elevation en_US
dc.title Rapid psychophysical calibration using bisection scaling for individualized control of source elevation in auditory display en_US
dc.type Text
dc.type.genre Proceedings
dspace.entity.type Publication
local.contributor.corporatename Sonification Lab
local.relation.ispartofseries International Conference on Auditory Display (ICAD)
relation.isOrgUnitOfPublication 2727c3e6-abb7-4df0-877f-9f218987b22a
relation.isSeriesOfPublication 6cb90d00-3311-4767-954d-415c9341a358
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Martens2002a.pdf
Size:
163.19 KB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.13 KB
Format:
Item-specific license agreed upon to submission
Description:
Collections