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Updated: Jul 20, 2025
07:14
A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
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Randomizing spectral cues used to resolve front-back reversals in sound-source localization.
1Spatial Hearing Lab, College of Health Solutions, Arizona State University, Tempe, Arizona 85004, USA.
The Journal of the Acoustical Society of America
|August 4, 2023
Summary
Front-back reversals (FBRs) in sound localization are listener-dependent. Randomizing spectral profiles increased FBRs for high-frequency sounds, while head rotation consistently decreased FBRs.
Area of Science:
- Auditory perception
- Acoustic signal processing
- Psychoacoustics
Background:
- Front-back reversals (FBRs) are common errors in sound localization due to cone-of-confusion ambiguity.
- Low-frequency sounds rely on interaural differences, leading to more FBRs than high-frequency sounds.
- Spectral cues in high-frequency sounds can aid localization, but their precise role is not fully understood.
Purpose of the Study:
- To investigate the influence of spectral profile randomization on FBRs.
- To determine the extent to which spectral features aid sound-source localization.
- To examine the effect of head rotation on FBRs.
Main Methods:
- Listeners localized two-octave wide noise bands with randomly varied spectral profiles.
- FBRs were quantified across different frequency bands and spectral conditions.
- The impact of head rotation on FBR occurrence was assessed.
Main Results:
- Randomizing spectral profiles increased FBRs for high-frequency noise bands.
- This randomization likely diminished the usefulness of spectral cues, increasing reliance on ambiguous interaural differences.
- Head rotation consistently reduced FBRs, irrespective of spectral profile randomization.
Conclusions:
- Spectral profile randomization can impair sound localization by reducing the effectiveness of spectral cues.
- Interaural differences become more dominant for localization when spectral cues are degraded.
- Head rotation is an effective strategy for reducing front-back confusion in sound localization.
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