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Testing paradigms for assistive hearing devices in diverse acoustic environments
Ram M C Charan1, Hussnain Ali1, John H L Hansen1
1Cochlear Implant Laboratory - Center for Robust Speech Systems The University of Texas at Dallas, Richardson TX, USA.
Interspeech
|July 26, 2021
Summary
This study introduces a new testing method to evaluate assistive hearing devices (AHDs) for safety and sound quality. It ensures devices protect hearing across various acoustic environments, enhancing user comfort and perception.
Area of Science:
- Audiology and Signal Processing
- Biomedical Engineering
- Hearing Science
Background:
- Unsafe noise exposure and personal audio device use pose risks of hearing loss globally.
- Assistive hearing devices (AHDs), including hearing aids (HAs) and cochlear implants (CIs), are crucial for auditory rehabilitation.
- Current AHDs operate within audiologist-prescribed limits for safety and perception, with signal processing engineers implementing design checks.
Purpose of the Study:
- To propose a comprehensive testing and evaluation paradigm for audio devices.
- To investigate AHD behavior and safety concerns in diverse acoustic conditions.
- To assess the impact of AHDs on hearing comfort, sound quality, and biological safety.
Main Methods:
- Characterizing device performance with extensive acoustic inputs.
- Monitoring output behavior under various conditions.
- Utilizing the CCi-MOBILE Research Interface (RI) for cochlear implant/hearing aid research.
- Estimating parameters like pulse-width (PW) and inter-phase gap (IPG).
Main Results:
- The proposed paradigm effectively characterizes AHD performance across different acoustic environments.
- Evaluation of parameters like PW and IPG provides insights into device impact.
- The study establishes a framework for assessing listening perception and biological safety.
Conclusions:
- The developed testing paradigm offers a robust method for evaluating AHDs.
- This approach ensures AHDs maintain safety limits and optimize user experience.
- It contributes to the development of safer and more effective auditory assistive technologies.
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