Reliability of Interaural Time Difference-Based Localization Training in Elderly Individuals with Speech-in-Noise...

Area of Science:

• Auditory Neuroscience
• Speech Perception
• Gerontology

Background:

• Interaural-time-difference (ITD) training enhances sound localization.
• Limited research exists on ITD in the envelope (ITD ENV) for speech-in-noise perception training.
• Elderly individuals often experience difficulties with speech-in-noise perception.

Purpose of the Study:

• To investigate the reliability of an ITD ENV-based training program.
• To assess the impact of ITD ENV training on speech-in-noise perception in elderly individuals.
• To determine the long-term effects of this auditory training.

Main Methods:

• An interventional study involving 16 elderly men (55-65 years) with normal hearing and speech-in-noise disorder.
• A localization training program focused on ITD ENV.
• Speech-in-noise tests administered before training, immediately after, and at a 2-month follow-up.
• Statistical analysis using the Friedman test and SPSS software.

Main Results:

• Significant improvements in speech-in-noise perception scores were observed across the three time points (P=0.001).
• No significant difference was found between scores immediately after training and at the 2-month follow-up (P=0.212), indicating sustained benefits.
• The training program demonstrated reliability in enhancing auditory processing.

Conclusions:

• ITD ENV-based localization training is a reliable method for improving speech-in-noise perception in elderly individuals.
• The positive effects of the training are durable, persisting for at least two months.
• This auditory training offers a promising intervention for age-related hearing difficulties.