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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

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Head-orienting behaviors during simultaneous speech detection and localization.

Angkana Lertpoompunya^1,2, Erol J Ozmeral¹, Nathan C Higgins¹

¹Department of Communication Sciences and Disorders, University of South Florida, Tampa, FL, United States.

Frontiers in Psychology

|October 2, 2024

Summary

This summary is machine-generated.

Older adults with hearing loss struggle with sound localization and speech detection, often using a "wait-and-listen" head movement strategy. This impacts spatial awareness and auditory processing in complex environments.

Keywords:

dual-task head movements masking spatial cues speech detection visual cues

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Area of Science:

Auditory Neuroscience
Human Auditory Perception
Speech Processing

Background:

Head movements are crucial for auditory spatial awareness and sound source localization.
Understanding how hearing impairment affects head-orienting behaviors is essential for auditory rehabilitation.

Purpose of the Study:

To investigate head-orienting behaviors in younger and older adults with varying hearing statuses.
To assess the impact of hearing loss on auditory localization and speech detection in complex acoustic environments.

Main Methods:

A dual-task paradigm measured speech source localization and number detection.
Head-tracking analyzed head-orienting behaviors under different auditory and visual cue conditions.
Participants included younger normal-hearing adults and older adults with mild-to-severe sensorineural hearing loss.

Main Results:

Both groups exhibited target undershooting for sound sources beyond 60° azimuth.
Listeners with hearing loss showed greater head-turn errors than normal-hearing listeners, even with visual cues.
Digit detection accuracy was lower in the hearing loss group, influenced by signal-to-noise ratio (SNR).

Conclusions:

Hearing loss significantly impairs head-orienting behaviors for sound localization.
A 'wait-and-listen' strategy was observed in challenging listening conditions, indicating information gathering before movement.
Findings highlight the need for strategies to improve auditory spatial awareness and speech understanding in individuals with hearing loss.