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Updated: Jul 4, 2026
07:52
An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
Published on: March 13, 2026
The effect of head-related transfer function measurement methodology on localization performance in spatial audio
Justin A MacDonald1, Phuong K Tran
1Army Research Laboratory, Aberdeen Proving Ground, Maryland, USA. jmacd@nmsu.edu
Human Factors
|June 4, 2008
Summary
The choice of head-related transfer function (HRTF) measurement methods has minimal impact on the accuracy of spatial audio localization. This finding simplifies the design of virtual reality and wayfaring systems.
Area of Science:
- Acoustics
- Psychoacoustics
- Human-Computer Interaction
Background:
- Spatial audio interfaces rely on head-related transfer function (HRTF) data for realistic sound localization.
- Diverse HRTF measurement techniques exist, with unclear impacts on spatial audio performance.
Purpose of the Study:
- To investigate how different HRTF measurement methodologies affect the accuracy of localizing spatialized auditory stimuli.
- To compare the performance of publicly available and in-house HRTF data sets.
Main Methods:
- Sixteen participants performed a sound localization task with broadband stimuli.
- Stimuli were spatialized using four distinct HRTF data sets (two public, two in-house).
- HRTFs were sourced from the Knowles Electronics Mannequin for Acoustics Research.
Main Results:
- No significant differences in localization error or front/back reversals were found across HRTF data sets.
- Localization accuracy was lowest near the medial axis due to increased reversals.
Conclusions:
- The selection of a generalized HRTF data set has minimal influence on the localizability of spatialized audio.
- Findings will guide the development of spatial audio interfaces for navigation, communication, and virtual reality.
