Estimating uncomfortable loudness levels using evoked potentials to auditory stimuli for hearing aid fitting

Area of Science:

• Audiology
• Neuroscience
• Biomedical Engineering

Background:

• Determining uncomfortable loudness levels (UCL) is challenging for individuals with hearing loss.
• Current methods for assessing UCL can be burdensome for patients.

Purpose of the Study:

• To propose and validate a novel method for estimating UCL based on auditory evoked potentials (AEPs).
• To assess the feasibility of using AEPs to objectively measure sound tolerance thresholds.

Main Methods:

• Auditory evoked potentials (AEPs) were recorded from normal-hearing adults using a triplet tone burst paradigm.
• Electroencephalogram data was processed using wavelet transformation and linear discriminant analysis.
• UCLs were estimated by correlating AEP wavelet coefficients with subjective UCL measurements.

Main Results:

• The proposed AEP-based method successfully estimated UCLs.
• The mean estimation error for UCL was 4.9 ± 5.0 dB.
• The findings indicate a strong correlation between AEPs and subjective UCL.

Conclusions:

• Auditory evoked potentials provide a viable objective measure for estimating uncomfortable loudness levels.
• This AEP-based method offers a less strenuous alternative for assessing sound tolerance in individuals with hearing impairments.