Factors that influence the benefit from amplification in the elderly

Area of Science:

• Audiology
• Hearing Science
• Speech and Hearing Disorders

Background:

• Hearing aid benefit varies among individuals with sensorineural hearing impairment.
• Quantifying the relative importance of different factors influencing hearing aid benefit is crucial.

Purpose of the Study:

• To investigate the relative importance of various auditory and non-auditory factors on hearing aid benefit.
• To determine which factors best predict the benefit derived from amplification.

Main Methods:

• 54 participants with symmetrical sensorineural hearing impairment were tested.
• Simulated hearing aid characteristics were used with two disability measures (word identification in sentences).
• Benefit was calculated as the difference in correct scores with and without simulated aid features.

Main Results:

• Hearing threshold level, frequency resolution, central auditory function, and threshold discrepancy were initially correlated with benefit.
• Frequency resolution and threshold discrepancy remained significant predictors after accounting for hearing threshold level.
• Frequency resolution and threshold discrepancy explained an additional 21.1% of the variance in hearing aid benefit.

Conclusions:

• Frequency resolution is a key factor in predicting hearing aid benefit.
• Central auditory factors, like co-modulation masking release, also play a significant role.
• Age was not found to be a significant predictor of benefit in this study once other factors were controlled.