Mechanisms of Spectrotemporal Modulation Detection for Normal- and Hearing-Impaired Listeners.

ABSTRACT: Spectrotemporal modulations (STM) are essential features of speech signals that make them intelligible. While their encoding has been widely investigated in neurophysiology, we still lack a full understanding of how STMs are processed at the behavioral level and how cochlear hearing loss impacts this processing. Here, we introduce a novel methodological framework based on psychophysical reverse correlation deployed in the modulation space to characterize the mechanisms underlying STM detection in noise. We derive perceptual filters for young normal-hearing and older hearing-impaired individuals performing a detection task of an elementary target STM (a given product of temporal and spectral modulations) embedded in other masking STMs. Analyzed with computational tools, our data show that b

SUBMITTER: Ponsot E 

PROVIDER: S-EPMC7905488 | biostudies-literature | 2021 Jan-Dec

REPOSITORIES: biostudies-literature