Spectral Ripples in Normal and Electric Hearing Models
Technologies, vol. 13, pp. 505
Abstract
Devising a psychophysical test to assess spectral resolution has not been easy. Two tests that have been used previously are the spectral ripple test and the spectral-temporally modulated ripple test (SMRT). Over time, questions have been raised about the validity of these tests. We introduce a new computational electric hearing (with a cochlear implant, CI) model that can simulate how sound is transferred through a speech processor and is received by the cochlear nerve fibers. With this electric hearing model and a normal hearing model, we investigated whether the known limitations of these tests can be detected. For the spectral ripple test, we could show the limitations in the output of the CI, the information conveyed to the cochlear nerve, to estimate the threshold, and show the benefit of current steering. In addition, we reproduced the aliasing effect with normal hearing in the SMRT, as well as the reduced ripple resolution in CI users. Our computational modeling framework can serve as a first-step assessment of the validity of new psychophysical tests. Moreover, it could be used to test new speech coding strategies.
Authors 3
-
Leiden University Medical Center
Affiliation as printed
Department of Otorhinolaryngology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
-
Leiden University Medical Center
Affiliation as printed
Department of Otorhinolaryngology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
-
Johan H. M. Frijns corresponding Aachen Department of Otorhinolaryngology, Leiden University Medical Center Leiden Institute for Brain and Cognition
Leiden University · Leiden University Medical Center · Delft University of Technology
Affiliation as printed
Department of Bioelectronics, EEMCS, Delft University of Technology, P.O. Box 5031, 2600 GA Delft, The Netherlands
Department of Otorhinolaryngology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
Leiden Institute for Brain and Cognition, Leiden University, P.O. Box 9600, 2300 RC Leiden, The Netherlands
Cited by 2 stored of 2
2 results
No patents citing this paper on Lens.org (checked 2026-10-11).