Communication Sciences & Oral Health
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Browsing Communication Sciences & Oral Health by Author "Bharadwaj, Sneha V."
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Item Effects of auditory feedback deprivation length on the vowel ∕ε∕ produced by pediatric cochlear-implant users(Acoustical Society of America, 2007) Bharadwaj, Sneha V.; Graves, Amanda G.; Bauer, Delia D.; Assmann, Peter F.Effects of auditory deprivation on speech production by ten cochlear-implanted children were investigated by turning off the implant for durations ranging from 0.3 to 5.0s and measuring the formant frequencies (F1 and F2) of the vowel ∕ε∕. In five of the ten talkers, F1 and/or F2 shifted when auditory feedback was eliminated. Without feedback, F2 frequency lowered consistently, suggesting vowel centralization. Phonetic transcription indicated that some of these acoustic changes led to perceptible shifts in phonetic quality. The results provide evidence that brief periods of auditory deprivation can produce perceptible changes in vowels produced by some cochlear-implanted children.Item Effects of auditory feedback on fricatives produced by cochlear-implanted adults and children: Acoustic and perceptual evidence(Acoustical Society of America, 2006-02) Bharadwaj, Sneha V.; Tobey, Emily A.; Assmann, Peter F.; Katz, William F.Acoustic analyses and perception experiments were conducted to determine the effects of brief deprivation of auditory feedback on fricatives produced by cochlear implant users. The words /si/ and /ʃi/ were recorded by four children and four adults with their cochlear implant speech processor turned on or off. In the processor-off condition, word durations increased significantly for a majority of talkers. These increases were greater for children compared to adults, suggesting that children may rely on auditory feedback to a greater extent than adults. Significant differences in spectral measures of /ʃ/ were found between processor-on and processor-off conditions for two of the four children and for one of the four adults. These talkers also demonstrated a larger /s/-/ʃ/ contrast in centroid values compared to the other talkers within their respective groups. This finding may indicate that talkers who produce fine spectral distinctions are able to perceive these distinctions through their implants and to use this feedback to fine tune their speech. Two listening experiments provided evidence that some of the acoustic changes were perceptible to normal-hearing listeners. Taken together, these experiments indicate that for certain cochlear-implant users the brief absence of auditory feedback may lead to perceptible modifications in fricative consonants.Item EMA compatibility of the Clarion 1.2 cochlear implant system(Acoustical Society of America, 2003-06) Katz, William F.; Bharadwaj, Sneha V.; Gabbert, Gretchen J.; Tobey, Emily A.Three experiments examined whether the Clarion 1.2 S-Series cochlear implant could be safely and effectively used within a Carstens Medizinelektronik EMA (electromagnetic articulography) system. Experiment 1 indicated no measurable effects of EMA magnetic fields on implant function. Experiment 2 showed no influence of the implant on the accuracy of EMA measurements. Experiment 3 found no indication of reduced sentence repetition abilities when EMA fields were present. The results suggest experiments with the Clarion 1.2 cochlear implant and the Carstens AG100 articulograph are safe and feasible.Item An exploratory study of visual sequential processing in children with cochlear implants(Elsevier, 2016-06) Bharadwaj, Sneha V.; Mehta, Jyutika A.Objective The objective of the study was to compare visual sequential processing in school-age children with cochlear implants (CIs) and their normal-hearing (NH) peers. Visual sequential processing was examined using both behavioral and an event-related potential (ERP) measures.Item Sensory processing disorder in children with cochlear implants(American Occupational Therapy Association, 2009-03) Bharadwaj, Sneha V.; Daniel, Linda L.; Matzke, Patricia L.We examined sensory-processing disorder (SPD) in children with cochlear implants and explored the relationship between SPD and duration of hearing loss or duration of cochlear implant use. Caregivers of 30 children completed the Sensory Profile Questionnaire (SPQ). Seventy percent of the children showed “at-risk” or “different” behaviors in one or more of five categories of the SPQ: auditory, visual, vestibular, tactile, and oral processing. No noteworthy relationships surfaced between duration of deafness or duration of cochlear implant use and the atypical behaviors identified. To validate these findings further, postrotary nystagmus (PRN) testing and Miller's Assessment for Preschoolers (MAP) were administered to a subset of children. PRN was atypical in all 6 children tested. MAP findings revealed atypical sensory processing in 4 of the 6 children. Findings suggested that children with cochlear implants may be at risk for SPD. The findings are discussed in light of clinician and teacher referral for occupational therapy evaluations.Item Working memory, short-term memory and reading proficiency in school-age children with cochlear implants(Elsevier, 2015-10) Bharadwaj, Sneha V.; Maricle, Denise E.; Green, Lauren; Allman, TambyObjective:The objective of the study was to examine short-term memory and working memory through both visual and auditory tasks in school-age children with cochlear implants. The relationship between the performance on these cognitive skills and reading as well as language outcomes were examined in these children.