The effect of elevation on ITD symmetry

Andrea F. Genovese, Jordan Juras, Chris Miller, Agnieszka Roginska

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In binaural simulations, Head-Related Impulse Responses are used to recreate a 3D auditory display through headphones. Public repositories of individually measured HRIRs are widely used in industry and research. However, head-related anthropometric asymmetries, among measured subjects, are a likely cause of measured asymmetries in Interaural Time Delay cues (ITDs), which may lead to imprecise sound localization. As part of a larger study on HRIR personalization, this paper expands, to the elevation dimension, the investigation of ITD asymmetry in public databases of measured HRIRs. In a previous exploratory study, concerning the horizontal plane only, a region of sensitivity, where the ITD asymmetry was observed to be significantly more prominent, was identified in datasets of individually measured HRIRs approximately between the azimuth range of θ = ±90° to ±130°. For this paper. two publicly available databases of individual HRIRs were selected and analyzed in search of an elevation effect on ITD symmetry. Results found that an increase or decrease in elevation angle φ, away from the horizontal plane, affects the asymmetry curve by reducing the gap between average and peak ITD asymmetry values within the mentioned region in a roughly linear trend. This finding points to the fact that, within the examined datasets, the statistical presence of ITD asymmetries is gradually less severe, although still present, as the elevation angle moves away from the horizontal plane.

Original languageEnglish (US)
Title of host publicationProceedings of the 2016 AES International Conference
Subtitle of host publicationHeadphone Technology
EditorsJurgen Peissig, Alexander Lindau
PublisherAudio Engineering Society
ISBN (Electronic)9781942220091
StatePublished - 2016
Event2016 AES International Conference on Headphone Technology - Aalborg, Denmark
Duration: Aug 24 2016Aug 26 2016

Publication series

NameProceedings of the AES International Conference
Volume2016-August

Other

Other2016 AES International Conference on Headphone Technology
CountryDenmark
CityAalborg
Period8/24/168/26/16

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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