PMID: 9416450Jan 7, 1998Paper

Effects of formant bandwidth on the identification of synthetic vowels by cochlear implant recipients

Ear and Hearing
J W HawksL K Holden

Abstract

The main objective was to investigate whether the broadening and narrowing of formant bandwidths had a significant effect on the identification of vowels often confused by Nucleus cochlear implant recipients using the Spectral Peak (SPEAK) speech coding strategy. Specifically, identification performance for synthetic vowels with the first two formants (F1 and F2) parametrically varied in bandwidth was explored. Eight implanted subjects identified synthetic versions of the isolated vowel sounds [I, epsilon, lambda, [symbol: see text]] with F1 and F2 bandwidth manipulations, as well as foil tokens of [i, u, a, ae, [symbol: see text]]. Identification performance was examined in terms of percent correct as well as error patterns. Further analyses compared patterns of electrode activation. In general, broader F1 bandwidths yielded poorer performance and narrower F1 bandwidths yielded better performance relative to identifications for the reference stimuli. However, similar manipulations of F2 bandwidths resulted in less predictable performance. Comparison of electrode activation patterns indicated a distinct sharpening or flattening in the F1 frequency region for subjects with the greatest performance extremes. Manipulation of F1 ba...Continue Reading

References

Aug 1, 1991·Ear and Hearing·J F Patrick, G M Clark
Feb 1, 1990·The Journal of the Acoustical Society of America·D H Klatt, L C Klatt
Jan 1, 1987·The Journal of the Acoustical Society of America·M R LeekQ Summerfield
Feb 1, 1985·The Journal of the Acoustical Society of America·T M van Veen, T Houtgast
Feb 1, 1995·The Journal of the Acoustical Society of America·J W Hawks, J D Miller
Feb 1, 1994·The Journal of the Acoustical Society of America·J W Hawks
Jun 1, 1997·The Journal of the Acoustical Society of America·M W SkinnerM S Fourakis

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Citations

Jun 8, 2013·The Journal of the Acoustical Society of America·Carl VerschuurJack Constable
Jun 1, 2005·Audiology & Neuro-otology·Rudolf GlueckertAnneliese Schrott-Fischer
Sep 27, 2001·The Journal of the Acoustical Society of America·P C Loizou, O Poroy
Jan 20, 2018·American Journal of Speech-language Pathology·Gemma Moya-GaléErika S Levy
Jan 5, 2001·The Annals of Otology, Rhinology & Laryngology. Supplement·L S DavidsonA E Geers

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