Evaluation of Amplification Systems for Sound Localization and Speech Perception in Single-Sided Deafness: A...

Area of Science:

• Audiology
• Neuroscience
• Rehabilitation Medicine

Background:

• Single-sided deafness (SSD) presents significant challenges in sound localization and speech perception.
• Hearing rehabilitation for SSD often involves bone-anchored hearing aids (BAHAs) or contralateral routing of signals (CROS) hearing aids.
• Evaluating the comparative efficacy of different hearing devices is crucial for optimizing patient outcomes.

Purpose of the Study:

• To compare the effectiveness of softband BAHAs and CROS HAs in improving sound localization and speech perception in individuals with SSD.
• To assess subjective satisfaction with different hearing device options for SSD.
• To provide evidence-based guidance for selecting hearing devices for SSD patients.

Main Methods:

• A single-subject, repeated-measures design was used with 18 participants (aged 20-50) with SSD.
• Participants were tested under unaided, softband BAHA, and CROS HA conditions in a counterbalanced order.
• Evaluations included sound localization tests, speech perception in noise assessments, and subjective satisfaction ratings.

Main Results:

• Softband BAHAs significantly improved sound localization, especially for low-frequency stimuli, compared to CROS HAs and unaided conditions (p = .03).
• Subjective satisfaction ratings favored the softband BAHA.
• Speech perception in noise showed varied benefits across devices, with both demonstrating improvements in specific scenarios.

Conclusions:

• Softband BAHAs offer superior sound localization benefits for SSD patients compared to CROS HAs.
• The findings support the use of softband BAHAs in SSD rehabilitation to enhance auditory skills and quality of life.
• Further research is needed to refine rehabilitation strategies and address remaining limitations for SSD individuals.