Power output and hearing performance in osseointegrated auditory devices.

Area of Science:

• Audiology
• Biomedical Engineering
• Otolaryngology

Background:

• Osseointegrated auditory devices utilize bone conduction for hearing improvement.
• Factors influencing sound transmission are studied, but processor power output's role is less understood.

Purpose of the Study:

• To investigate the relationship between osseointegrated auditory device processor power output and achieved hearing improvement.

Main Methods:

• Forty-four patients received percutaneous Baha® 5 devices.
• Pre- and post-operative hearing thresholds (pure tone, free-field) and speech recognition (quiet, noise) were assessed.
• Direct bone conduction thresholds and processor power output values were recorded.

Main Results:

• Significant hearing improvement was observed, with a mean free-field gain of 29.18 dB and improved speech recognition.
• Sixty-three percent of patients closed their air-bone gap.
• A correlation between bone conduction thresholds and power output was found at 1,000 Hz, but no significant association was found between power output and functional or speech recognition gain.

Conclusions:

• Osseointegrated auditory devices effectively enhance tonal thresholds and speech recognition, including in noisy environments.
• A relationship exists between bone conduction thresholds and processor power output, specifically in mid and high frequencies.
• Further research is needed to fully understand the factors influencing hearing gain from these devices.