title: The effect of filtering and inter-digit interval on the recognition of dichotic digits.
abstract: The new compact disc from the Department of Veterans Affairs, Tonal and Speech Materials for Auditory, Perceptual Assessment, Disc 2.0 (1998), contains two lists of randomly interleaved 1-, 2-, and 3-pair dichotic digits. Two experiments are reported, in which the effects of low-pass filtering and inter-digit interval on dichotic digit recognition were investigated in adult listeners with normal hearing and with mild-to-moderate cochlear hearing loss. Results demonstrated that in the filtered condition, as the low-pass cutoff was increased, there was an increase in recognition performance for 1-, 2-, and 3-pair dichotic digits. When compared to normative data for the materials, findings indicate that the interleaved 1-, 2-, and 3-pair dichotic digit materials were essentially resistant to the effects of hearing loss. There was no significant change in recognition performance as a function of inter-digit interval. The studied 625-ms range of inter-digit intervals studied produced consistent recognition performance with both groups of listeners.
authors.affiliation: Veteran Affairs Medical Center, Mountain Home, Tennessee 37684, USA. anne.strouse@med.va.gov
authors.forename: A S
authors.initials: AS
authors.lastname: Carter
authors.forename: R H
authors.initials: RH
authors.lastname: Wilson
mesh_terms: D000328:Adult; D001307:Auditory Perception / Q000502:physiology*; D004007:Dichotic Listening Tests; D005260:Female; D034381:Hearing Loss / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D019986:Persons with Hearing Disabilities; D013067:Speech Perception / Q000502:physiology*