Implantable hearing aid using a piezoelectric ossicular vibrator: a speech audiometric study

Area of Science:

• Audiology
• Biomedical Engineering
• Hearing Science

Background:

• Conventional hearing aids (CHA) can struggle with speech clarity in noisy environments.
• Implantable hearing aids (IHA) offer a potential alternative for improved auditory perception.
• Evaluating the performance of novel hearing aid technologies is crucial for audiological advancements.

Purpose of the Study:

• To compare the speech discrimination capabilities of a piezoelectric implantable hearing aid (IHA) against a conventional hearing aid (CHA).
• To assess device performance under varying background noise conditions.

Main Methods:

• Speech audiometric studies were conducted on seven patients comparing IHA and CHA.
• Monosyllabic and bisyllabic word recognition was tested with and without background noise (65-75 dB SPL).
• Speech sound intensity was maintained at 65 dB SPL.

Main Results:

• No significant difference in speech discrimination was found between IHA and CHA in quiet conditions.
• The IHA significantly outperformed the CHA in the presence of background noise at 65 dB SPL.
• While scores decreased for both devices with increased noise (70-75 dB SPL), the IHA maintained a significant advantage.

Conclusions:

• The piezoelectric implantable hearing aid (IHA) shows superior speech recognition compared to conventional hearing aids (CHA) in noisy environments.
• This suggests IHAs may offer enhanced audibility and communication benefits for individuals in challenging acoustic settings.
• Further research into implantable hearing aid technology is warranted to optimize speech perception for hearing-impaired individuals.