Simulated Hearing Loss in Healthy Young Adults Does Not Change Reactive Balance Responses

Area of Science:

• Auditory Neuroscience
• Biomechanics
• Gerontology

Background:

• Hearing loss is linked to increased fall risk in older adults, impacting mobility and balance.
• Dual-tasking (auditory processing + balance) may worsen deficits, but isolating hearing effects is challenging.
• Understanding hearing loss effects on balance is crucial for fall prevention strategies.

Purpose of the Study:

• To evaluate the immediate impact of simulated hearing loss on reactive balance control in young adults.
• To investigate balance responses during a dual-task paradigm combining auditory and postural challenges.
• To differentiate hearing loss effects from age-related neuromuscular and cognitive factors.

Main Methods:

• Nineteen healthy young adults participated in a dual-task protocol with unexpected surface translations.
• Auditory conditions included normal hearing and simulated hearing loss using frequency-specific attenuation.
• Key measures: Speech-in-Noise test, reactive balance (COP-COM distance, reaction time), and kinematic/kinetic data.

Main Results:

• Simulated hearing loss significantly reduced Speech-in-Noise test performance, indicating increased auditory difficulty.
• Reactive balance control (COP-COM distance, reaction time) was not significantly affected by auditory conditions.
• No interaction was found between auditory conditions and balance responses.

Conclusions:

• Acute simulated hearing loss does not impair reactive balance control in young adults under dual-task conditions.
• Young adults possess sufficient attentional resources to compensate for simulated hearing loss during balance tasks.
• Further research on age-related auditory and cognitive decline is essential for understanding balance impairments in older adults with hearing loss.