title: Intensity discrimination and detection of amplitude modulation in electric hearing.
abstract: Wojtczak and Viemeister [J. Acoust. Soc. Am. 106, 1917-1924 (1999)] demonstrated a close relationship between intensity difference limens (DLs) and 4-Hz amplitude modulation (AM) detection thresholds in normal-hearing acoustic listeners. The present study demonstrates a similar relationship between intensity DLs and AM detection thresholds in cochlear-implant listeners, for gated stimuli. This suggests that acoustic and cochlear-implant listeners make use of a similar decision variable to perform intensity discrimination and modulation detection tasks. It can be shown that the absence of compression in electric hearing does not preclude this possibility.
authors.affiliation: Department of Otolaryngology, University of Minnesota, Minneapolis 55455, USA. donal005@tc.umn.edu
authors.forename: G S
authors.initials: GS
authors.lastname: Donaldson
authors.forename: N F
authors.initials: NF
authors.lastname: Viemeister
mesh_terms: D019929:Cochlear Implantation; D003638:Deafness / Q000601:surgery; D006801:Humans; D008954:Models, Biological; D013067:Speech Perception / Q000502:physiology*