The Lombard Effect Observed in Speech Produced by Cochlear Implant Users in Noisy Environments: A Naturalistic Study

dc.contributor.authorLee, J.en_US
dc.contributor.authorAli, H.en_US
dc.contributor.authorZiaei, A.en_US
dc.contributor.authorTobey, Emily A.en_US
dc.contributor.authorHansen, John H. L.en_US
dc.contributor.utdAuthorTobey, Emily A.en_US
dc.contributor.utdAuthorHansen, John H. L.en_US
dc.descriptionFull text access from this site is available only to current UTD affiliates.en_US
dc.description.abstractThe Lombard effect is an involuntary response speakers experience in the presence of noise during voice communication. This phenomenon is known to cause changes in speech production such as an increase in intensity, pitch structure, formant characteristics, etc., for enhanced audibility in noisy environments. Although well studied for normal hearing listeners, the Lombard effect has received little, if any, attention in the field of cochlear implants (CIs). The objective of this study is to analyze speech production of CI users who are postlingually deafened adults with respect to environmental context. A total of six adult CI users were recruited to produce spontaneous speech in various realistic environments. Acoustic-phonetic analysis was then carried out to characterize their speech production in these environments. The Lombard effect was observed in the speech production of all CI users who participated in this study in adverse listening environments. The results indicate that both suprasegmental (e.g., F0, glottal spectral tilt and vocal intensity) and segmental (e.g., F1 for /i/ and /u/) features were altered in such environments. The analysis from this study suggests that modification of speech production of CI users under the Lombard effect may contribute to some degree an intelligible communication in adverse noisy environments. © 2017 Acoustical Society of America.en_US
dc.description.departmentErik Jonsson School of Engineering and Computer Scienceen_US
dc.description.departmentSchool of Behavioral and Brain Sciencesen_US
dc.description.departmentCenter for Robust Speech Systemsen_US
dc.description.sponsorshipNational Institutes of Health (National Institute of Deafness and other Communication Disorders (NIDCD)) grant no. R01 DC010494-01Aen_US
dc.identifier.bibliographicCitationLee, J., H. Ali, A. Ziaei, E. A. Tobey, et al. 2017. "The Lombard effect observed in speech produced by cochlear implant users in noisy environments: A naturalistic study." Journal of the Acoustical Society of America 141(4): 2788-2799.en_US
dc.publisherAcoustical Society of Americaen_US
dc.rights©2017 Acoustical Society of Americaen_US
dc.source.journalJournal of the Acoustical Society of Americaen_US
dc.subjectCochlear implantsen_US
dc.subjectSpeech perceptionen_US
dc.subjectPhonetics, Acousticen_US
dc.subjectOral communicationen_US
dc.titleThe Lombard Effect Observed in Speech Produced by Cochlear Implant Users in Noisy Environments: A Naturalistic Studyen_US


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