Temporal-gap detection by cochlear prosthesis users.
Minimum-detectable gaps for sinusoidal stimuli were measured for three users of a multi electrode cochlear prosthesis as functions of stimulus level, frequency, and electrode place within the cochlea. Stimulus level was scaled by sensation level and by growth-of-loudness functions generated for each condition by direct magnitude estimation. Minimum-detectable gaps decreased with increase in either sensation level or loudness, up to a plateau. When compared at equal sensation levels, the minimum-detectable gaps decreased with frequency increases. The frequency effect on minimum-detectable gaps is reduced if the data are considered at equal loudness. Comparison across place of stimulation within the cochlea showed minimum-detectable gaps to be shorter for more basal electrode placement at low stimulus levels. No differences in minimum-detectable gap as a function of place were found at higher stimulus levels.
Preece
J P
JP
Department of Speech Pathology, University of Iowa, Iowa City.
Tyler
R S
RS
D000328:Adult; D001309:Auditory Threshold; D003054:Cochlear Implants / Q000592:standards*; D003638:Deafness / Q000503:physiopathology* / Q000534:rehabilitation; D004056:Differential Threshold; D004566:Electrodes; D006801:Humans; D008144:Loudness Perception; D008875:Middle Aged