Evaluating Auditory Localization Capabilities in Young Patients with Single-Side Deafness

Area of Science:

• Auditory Neuroscience
• Pediatric Audiology
• Virtual Reality Applications

Background:

• Single-sided deafness (SSD) significantly impairs children's spatial hearing, impacting academic and social development.
• Understanding sound localization deficits in SSD is crucial for effective intervention strategies.

Purpose of the Study:

• To compare sound localization accuracy and compensatory head movements between children with SSD and normal-hearing (NH) peers in a virtual reality (VR) environment.
• To investigate sound localization performance across different azimuthal angles in left-SSD (L-SSD) and right-SSD (R-SSD) groups.

Main Methods:

• 44 children (20 NH, 24 SSD) participated in 3D VR sound localization tasks.
• Analysis included unsigned azimuth error (UAE), unsigned elevation error (UEE), and head movement distance.
• Non-parametric statistics compared NH vs. SSD and L-SSD vs. R-SSD performance.

Main Results:

• Children with SSD showed significantly higher UAE, UEE, and head movement distances than NH peers.
• Elevation localization (UEE) was more accurate than azimuthal localization (UAE) in the SSD group.
• Right-SSD participants exhibited greater azimuthal and elevation errors, particularly at rightward angles.

Conclusions:

• Children with SSD utilize insufficient head movements to overcome monaural spatial ambiguity.
• Significant localization deficits and compensatory effort highlight the need for classroom support strategies.
• L-SSD children outperformed R-SSD peers, suggesting hemispheric specialization in spatial hearing that warrants further research for targeted rehabilitation.