A daily alternating method for comparing different signal-processing strategies in hearing aids and in cochlear...

Area of Science:

• Audiology and Hearing Science
• Biomedical Engineering
• Speech and Hearing Sciences

Background:

• Current methods for selecting signal-processing strategies for hearing aids and cochlear implants lack efficiency and validity.
• In-office comparisons lack real-world listening experience, and short-term trials are subject to order effects.

Purpose of the Study:

• To evaluate a novel procedure for comparing signal-processing strategies using daily alternations.
• To determine if initial strategy preferences persist after prolonged, equal listening experience.

Main Methods:

• Eight subjects alternated daily between two signal-processing strategies for 1-3 months.
• Pre-trial and post-trial assessments included speech recognition, localization, and quality ratings.
• Subjects maintained daily diaries for ratings and comments.

Main Results:

• Pre-trial, four subjects favored one strategy; post-trial, only one maintained this preference.
• Of subjects with no initial preference, three developed one after prolonged listening.
• Initial performance trends did not consistently predict long-term outcomes.

Conclusions:

• Patients are willing to use a daily alternating listening strategy for up to three months.
• Initial strategy performance may not reflect long-term benefits.
• The daily alternating listening technique is recommended for optimizing hearing aid and cochlear implant fittings.