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Enhanced auditory spatial performance using individualized head-related transfer functions: An event-related

Matthew G Wisniewski1, Griffin D Romigh1, Stephanie M Kenzig1

  • 1711th Human Performance Wing, United States Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA matt.g.wisniewski@gmail.com, griffin.romigh@us.af.mil, stephanie.kenzig.ctr@us.af.mil, nandini.iyer.2@us.af.mil, brian.simpson.4@us.af.mil, eric.thompson.28@us.af.mil.

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Using personalized sound rendering with head-related transfer functions (HRTFs) improves auditory spatial perception. This enhancement is linked to brain activity, suggesting benefits beyond initial sensory processing.

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Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Human-Computer Interaction

Background:

  • Head-related transfer functions (HRTFs) are crucial for realistic 3D audio rendering.
  • Individualized HRTFs can improve spatial audio perception compared to generic ones.
  • Event-related potentials (ERPs) offer insights into neural processing of auditory stimuli.

Purpose of the Study:

  • To investigate the neural correlates of auditory spatial benefits from individualized HRTFs.
  • To examine how individualized HRTFs affect the detection of auditory spatial changes.
  • To explore the relationship between behavioral performance and brain activity.

Main Methods:

  • A roving oddball paradigm was used to present noise bursts with varying virtual elevations.
  • Participants detected the start of auditory runs rendered with individualized and non-individualized HRTFs.
  • Event-related potentials (ERPs), specifically P3 amplitudes, were recorded and analyzed.

Main Results:

  • Detection of auditory spatial changes was significantly enhanced with individualized HRTFs.
  • Increased P3 amplitudes were observed for the initial bursts of runs in the individualized HRTF condition.
  • A positive correlation was found between enhanced P3 amplitudes and improved behavioral detection.

Conclusions:

  • Individualized HRTFs provide a tangible benefit in auditory spatial tasks.
  • The observed neural enhancements suggest that post-sensory processing contributes to the HRTF individualization benefit.
  • These findings have implications for immersive audio technologies and hearing aid design.