WILLIAM WHITMER bill.whitmer@nottingham.ac.uk
Senior Investigator Scientist
WILLIAM WHITMER bill.whitmer@nottingham.ac.uk
Senior Investigator Scientist
DAVID MCSHEFFERTY DAVID.MCSHEFFERTY@NOTTINGHAM.AC.UK
Research Support Officer
Suzanne C. Levy
GRAHAM NAYLOR GRAHAM.NAYLOR@NOTTINGHAM.AC.UK
Professor of Hearing Sciences
Brent Edwards
Objectives:
Current hearing aids have a limited bandwidth, which limits the intelligibility and quality of their output, and inhibits their uptake. Recent advances in signal processing, as well as novel methods of transduction, allow for a greater useable frequency range. Previous studies have shown a benefit for this extended bandwidth in consonant recognition, talker-sex identification, and separating sound sources. To explore whether there would be any direct spatial benefits to extending bandwidth, we used a dynamic localization method in a realistic situation.
Design:
Twenty-eight adult participants with minimal hearing loss reoriented themselves as quickly and accurately as comfortable to a new, off-axis near-field talker continuing a story in a background of far-field talkers of the same overall level in a simulated large room with common building materials. All stimuli were low-pass filtered at either 5 or 10 kHz on each trial. To further simulate current hearing aids, participants wore microphones above the pinnae and insert earphones adjusted to provide a linear, zero-gain response.
Results:
Each individual trajectory was recorded with infra-red motion-tracking and analyzed for accuracy, duration, start time, peak velocity, peak velocity time, complexity, reversals, and misorientations. Results across listeners showed a significant increase in peak velocity and significant decrease in start and peak velocity time with greater (10 kHz) bandwidth.
Conclusions:
These earlier, swifter orientations demonstrate spatial benefits beyond static localization accuracy in plausible conditions; extended bandwidth without pinna cues provided more salient cues in a realistic mixture of talkers.
Whitmer, W. M., McShefferty, D., Levy, S. C., Naylor, G., & Edwards, B. (2022). Changes in Orientation Behavior due to Extended High-Frequency (5 to 10 kHz) Spatial Cues. Ear and Hearing, 43(2), 545-553. https://doi.org/10.1097/AUD.0000000000001113
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 29, 2021 |
Online Publication Date | Aug 9, 2021 |
Publication Date | 2022-03 |
Deposit Date | Jul 9, 2021 |
Publicly Available Date | Aug 9, 2021 |
Journal | Ear & Hearing |
Print ISSN | 0196-0202 |
Electronic ISSN | 1538-4667 |
Publisher | Lippincott, Williams & Wilkins |
Peer Reviewed | Peer Reviewed |
Volume | 43 |
Issue | 2 |
Pages | 545-553 |
DOI | https://doi.org/10.1097/AUD.0000000000001113 |
Keywords | Speech and Hearing; Otorhinolaryngology |
Public URL | https://nottingham-repository.worktribe.com/output/5764055 |
Publisher URL | https://journals.lww.com/ear-hearing/Fulltext/2022/03000/Changes_in_Orientation_Behavior_due_to_Extended.26.aspx |
Changes in Orientation Behavior due to Extended High-Frequency (5 to 10kHz) Spatial Cues
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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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