2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
10/27/2019 | 8:00 AM - 10:00 AM | Novel Hearing Aid Fitting Approaches for Developing Countries | Ventana Ballroom C
Novel Hearing Aid Fitting Approaches for Developing Countries
Fitting hearing aids in developing countries should be done responsibly following best practices. Studies show that using objective verification measures results in better outcomes (Tomblin et al, 2015, Abrams et al, 2012). A clinical-based approach ensures fitting precision but is time-intensive and therefore foregoes scalability. This project tested a novel hearing aid fitting approach using standardized audiograms and collected data on its efficiency, accuracy, and appropriateness for use in a developing country. 13 standardized audiograms were developed based on actual audiometric data collected during 2012 and 2015. 530 audiograms were sorted into categories based on degree and configuration. Audiograms completed in Malawi in 2016 were reviewed and 511 audiograms were used for the study. Each test audiogram was compared to the standardized audiograms and the template with the best fit was selected. Phonak Naida V90 SP and UP hearing aids were preset to DSL-child amplification targets within +2 dB of the targets as verified by the Audioscan Verifit. Each test audiogram was evaluated using two a clinical-based approach and standardized approach. The time to complete each approach was measured as well as the output for 55, 65, 75 dB SPL inputs and MPO. The standardized approach reduced the fitting time by more than 50%. The clinical approach was 100% effective using both lax and strict criteria. The standardized approach was 99-100% effective using lax criteria. Using strict criteria, 54% of the standardized audiograms achieved a pass rate of 80% or better at 65 dB SPL and 64% achieved a pass rate of 90% or better for MPO. The standardized approach was found to be both efficient and effective, albeit less precise. Potential errors using a standardized approach will be examined. he advantages and disadvantages of each approach will be discussed. Comparison to 1st-fit data will be made.
- Describe the differences in terms of measured audibility using first-fit and in situ fitting approaches vs. a fitting approach based on standardized audiograms.
- Discuss the advantages and disadvantages of a fitting approach based on standardized audiograms.
- Describe the effectiveness of using a standardized approach in a developing country
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Presenters/Authors
Ingrid McBride
(), Arizona State University, ingrid.mcbride@outlook.com;
Dr. McBride is a Clinical Professor of Audiology at Arizona State University. She specializes in amplification technology, including hearing aids, cochlear implants, and hearing assistive technology. Dr. McBride is dedicated to improving the access to audiologic services to underserved populations. Dr. McBride has extensive experience in providing humanitarian services on the ground in Malawi Africa and on site as well as via tele-audiology San Felipe Mexico.
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Robert Margolis
(), Audiology Incorporated, rhmargo001@gmail.com;
Robert Margolis is Emeritus Professor at the University of Minnesota, Adjunct Professor at Arizona State University, and President of Audiology Incorporated. His research career has focused on diagnostic audiology, most recently on development and validation of automated hearing tests. He has participated in audiology service projects in Chile, India, and Mexico.
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