Article
Assessing a Revised Model of Auditory Processing in Psychoacoustic Paradigms for Listeners with Normal Hearing and Hearing Loss (en)
* Presenting author
Abstract:
The computational model of auditory signal processing and perception (CASP; Jepsen et al., 2008, J.Acoust.Soc.Am.124(1), 422-438) is a perceptual model that has demonstrated success in predicting psychoacoustic data of normal hearing listeners and capturing average trends in data from listeners with hearing-impairment. However, the framework notably underestimates the substantial variability observed in the data, particularly in more complex speech-related tasks (Relaño-Iborra and Dau, 2022, Hear.Res.426, 108610). To overcome these limitations and further refine the model, a revised model was developed. This updated model replaces a simplified model of inner hair cell (IHC) transduction with a more realistic stage that considers the saturation of IHC transduction towards higher sound pressure levels, a factor crucial for encoding of supra-threshold sounds. The revised model and its modification are described, and their impact on the overall model performance is assessed in a simultaneous and non-simultaneous masking paradigms for listeners with normal hearing and hearing impairment. This evaluation addresses the combined effects of introducing sensorineural hearing loss in the model and the more realistic IHC model.