title: Consonant identification using temporal fine structure and recovered envelope cues.
abstract: The contribution of recovered envelopes (RENVs) to the utilization of temporal-fine structure (TFS) speech cues was examined in normal-hearing listeners. Consonant identification experiments used speech stimuli processed to present TFS or RENV cues. Experiment 1 examined the effects of exposure and presentation order using 16-band TFS speech and 40-band RENV speech recovered from 16-band TFS speech. Prior exposure to TFS speech aided in the reception of RENV speech. Performance on the two conditions was similar (∼50%-correct) for experienced listeners as was the pattern of consonant confusions. Experiment 2 examined the effect of varying the number of RENV bands recovered from 16-band TFS speech. Mean identification scores decreased as the number of RENV bands decreased from 40 to 8 and were only slightly above chance levels for 16 and 8 bands. Experiment 3 examined the effect of varying the number of bands in the TFS speech from which 40-band RENV speech was constructed. Performance fell from 85%- to 31%-correct as the number of TFS bands increased from 1 to 32. Overall, these results suggest that the interpretation of previous studies that have used TFS speech may have been confounded with the presence of RENVs.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
authors.forename: Jayaganesh
authors.initials: J
authors.lastname: Swaminathan
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
authors.forename: Charlotte M
authors.initials: CM
authors.lastname: Reed
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Desloge
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
authors.forename: Louis D
authors.initials: LD
authors.lastname: Braida
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
authors.forename: Lorraine A
authors.initials: LA
authors.lastname: Delhorne
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001302:Audiometry, Speech; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D011571:Psychoacoustics; D013061:Speech Acoustics; D013067:Speech Perception; D013997:Time Factors; D014833:Voice Quality; D055815:Young Adult