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Updated: Aug 14, 2025
04:32
Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
Published on: December 20, 2024
378
Comparative analysis between effective gain and functional gain in bone-anchored hearing aid users
Gabriela Fireman Martines Dias1, Valdéia Vieira de Oliveira2, Maria Fernanda Capoani Garcia Mondelli1
1Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Fonoaudiologia, Bauru, SP, Brasil.
Journal of Applied Oral Science : Revista FOB
|January 11, 2023
Summary
Effective gain (EG) better assesses Bone-Anchored Hearing Aid (BAHA) benefits than functional gain (FG). EG allows device comparison and aligns with speech perception results, unlike FG which showed inconsistencies.
Area of Science:
- Audiology
- Biomedical Engineering
- Otolaryngology
Background:
- Bone-Anchored Hearing Aids (BAHA) are used for various hearing loss types.
- Functional gain (FG) and effective gain (EG) are common methods to assess BAHA benefits.
Purpose of the Study:
- Compare EG and FG in BAHA users.
- Evaluate speech perception in silence and noise.
- Determine the most reliable method for assessing BAHA outcomes.
Main Methods:
- Analyzed data from 79 BAHA users implanted between 2014 and 2021.
- Conducted pure-tone audiometry (air and bone conduction).
- Performed free-field audiometric threshold tests and speech perception tests.
Main Results:
- Effective gain (EG) consistently yielded lower values than functional gain (FG) across all frequencies.
- Positive speech perception outcomes correlated with poorer FG values.
- EG proved superior for device comparison and adherence to prescriptive targets.
Conclusions:
- Effective gain (EG) provides a more accurate assessment of auditory performance with BAHA.
- Functional gain (FG) is unreliable for monitoring BAHA outcomes, showing discrepancies with actual speech perception benefits.
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