Speech production changes wih the use of a multichannel cochlear implant in postlingually hearing impaired adult

Profoundly deaf cochlear implant users provide an interesting population in which to assess the role of distorted auditory feedback in speech, since their electrically stimulated hearing is significantly different from normal hearing. The aim of the study was to evaluate, by means of spectrographic and listener analyses, the speech production changes in a postlingually deafened adult with the use of a multichannel cochlear implant over time, compared to that of hearing aids as well as no-amplification. The results indicated significant improvements in the use of suprasegmental speech features as well in the production of specific segmental features of speech.

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Sound Source Localization by Normal-Hearing Listeners, Hearing-Impaired Listeners and Cochlear Implant Listeners

Audiology and Neurotology ◽

10.1159/000444740 ◽

2016 ◽

Vol 21 (3) ◽

pp. 127-131 ◽

Cited By ~ 40

Author(s):

Michael F. Dorman ◽

Louise H. Loiselle ◽

Sarah J. Cook ◽

William A. Yost ◽

René H. Gifford

Keyword(s):

Cochlear Implant ◽

Source Localization ◽

Hearing Aids ◽

Sound Source ◽

Hearing Preservation ◽

Normal Hearing ◽

Hearing Impaired ◽

Sound Source Localization ◽

Localization Accuracy ◽

Rms Error

Objective: Our primary aim was to determine whether listeners in the following patient groups achieve localization accuracy within the 95th percentile of accuracy shown by younger or older normal-hearing (NH) listeners: (1) hearing impaired with bilateral hearing aids, (2) bimodal cochlear implant (CI), (3) bilateral CI, (4) hearing preservation CI, (5) single-sided deaf CI and (6) combined bilateral CI and bilateral hearing preservation. Design: The listeners included 57 young NH listeners, 12 older NH listeners, 17 listeners fit with hearing aids, 8 bimodal CI listeners, 32 bilateral CI listeners, 8 hearing preservation CI listeners, 13 single-sided deaf CI listeners and 3 listeners with bilateral CIs and bilateral hearing preservation. Sound source localization was assessed in a sound-deadened room with 13 loudspeakers arrayed in a 180-degree arc. Results: The root mean square (rms) error for the NH listeners was 6 degrees. The 95th percentile was 11 degrees. Nine of 16 listeners with bilateral hearing aids achieved scores within the 95th percentile of normal. Only 1 of 64 CI patients achieved a score within that range. Bimodal CI listeners scored at a level near chance, as did the listeners with a single CI or a single NH ear. Listeners with (1) bilateral CIs, (2) hearing preservation CIs, (3) single-sided deaf CIs and (4) both bilateral CIs and bilateral hearing preservation, all showed rms error scores within a similar range (mean scores between 20 and 30 degrees of error). Conclusion: Modern CIs do not restore a normal level of sound source localization for CI listeners with access to sound information from two ears.

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The role of auditory feedback in speech production: Implications for speech perception in the hearing impaired

2014 International Symposium on Integrated Circuits (ISIC) ◽

10.1109/isicir.2014.7029552 ◽

2014 ◽

Cited By ~ 1

Author(s):

Dongying Liang ◽

Yan Xiao ◽

Yongqiang Feng ◽

Yonghong Yan

Keyword(s):

Speech Perception ◽

Speech Production ◽

Auditory Feedback ◽

Hearing Impaired

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Perception of Auditory Distance in Normal-Hearing and Moderate-to-Profound Hearing-Impaired Listeners

Trends in Hearing ◽

10.1177/2331216519887615 ◽

2019 ◽

Vol 23 ◽

pp. 233121651988761 ◽

Cited By ~ 3

Author(s):

Gilles Courtois ◽

Vincent Grimaldi ◽

Hervé Lissek ◽

Philippe Estoppey ◽

Eleftheria Georganti

Keyword(s):

Hearing Loss ◽

Hearing Aids ◽

Normal Hearing ◽

Hearing Impaired ◽

Spatial Cues ◽

Linear Amplification ◽

Profound Hearing Loss ◽

Wireless Microphone ◽

Auditory Distance ◽

Non Linear

The auditory system allows the estimation of the distance to sound-emitting objects using multiple spatial cues. In virtual acoustics over headphones, a prerequisite to render auditory distance impression is sound externalization, which denotes the perception of synthesized stimuli outside of the head. Prior studies have found that listeners with mild-to-moderate hearing loss are able to perceive auditory distance and are sensitive to externalization. However, this ability may be degraded by certain factors, such as non-linear amplification in hearing aids or the use of a remote wireless microphone. In this study, 10 normal-hearing and 20 moderate-to-profound hearing-impaired listeners were instructed to estimate the distance of stimuli processed with different methods yielding various perceived auditory distances in the vicinity of the listeners. Two different configurations of non-linear amplification were implemented, and a novel feature aiming to restore a sense of distance in wireless microphone systems was tested. The results showed that the hearing-impaired listeners, even those with a profound hearing loss, were able to discriminate nearby and far sounds that were equalized in level. Their perception of auditory distance was however more contracted than in normal-hearing listeners. Non-linear amplification was found to distort the original spatial cues, but no adverse effect on the ratings of auditory distance was evident. Finally, it was shown that the novel feature was successful in allowing the hearing-impaired participants to perceive externalized sounds with wireless microphone systems.

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Rapid learning of minimally different words in five- to six-year-old children: effects of acoustic salience and hearing impairment

Journal of Child Language ◽

10.1017/s0305000915000197 ◽

2015 ◽

Vol 43 (2) ◽

pp. 310-337 ◽

Cited By ~ 2

Author(s):

MARCEL R. GIEZEN ◽

PAOLA ESCUDERO ◽

ANNE E. BAKER

Keyword(s):

Cochlear Implant ◽

Hearing Impairment ◽

Normal Hearing ◽

Task Demands ◽

Deaf Children ◽

Matching Task ◽

Object Matching ◽

Rapid Learning ◽

Minimal Pairs

AbstractThis study investigates the role of acoustic salience and hearing impairment in learning phonologically minimal pairs. Picture-matching and object-matching tasks were used to investigate the learning of consonant and vowel minimal pairs in five- to six-year-old deaf children with a cochlear implant (CI), and children of the same age with normal hearing (NH). In both tasks, the CI children showed clear difficulties with learning minimal pairs. The NH children also showed some difficulties, however, particularly in the picture-matching task. Vowel minimal pairs were learned more successfully than consonant minimal pairs, particularly in the object-matching task. These results suggest that the ability to encode phonetic detail in novel words is not fully developed at age six and is affected by task demands and acoustic salience. CI children experience persistent difficulties with accurately mapping sound contrasts to novel meanings, but seem to benefit from the relative acoustic salience of vowel sounds.

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Postural control during dual task in adolescent cochlear implant users under on/off-device conditions

Auditory and Vestibular Research ◽

10.18502/avr.v30i3.6532 ◽

2021 ◽

Author(s):

Zahra Nadimi ◽

Mansoureh Adel Ghahraman ◽

Ghassem Mohammadkhani ◽

Reza Hoseinabadi ◽

Shohreh Jalaie ◽

...

Keyword(s):

Postural Control ◽

Cochlear Implant ◽

Vestibular System ◽

Dual Task ◽

Cognitive Task ◽

Normal Hearing ◽

Hearing Impaired ◽

Caloric Test ◽

Vestibular Disorders ◽

Control Performance

Background and Aim: Vestibular system has several anatomical connections with cognitive regions of the brain. Vestibular disorders have negative effects on cognitive performance. Hearing-impaired patients, particularly cochlear implant users, have concomitant vestibular disorders. Previous studies have shown that attention assigned to postural control decreases while performing a cognitive task (dual task) in hearing-impaired children. Since the vestibular system and postural control performance develop around 15−16 years of age, the aim of this study was to compare postural control performance during dual task in adolescent boys with normal hearing and cochlear implant (CI) users with congenital hearing-impairment. Methods: Postural control was assessed in twenty 16−19 year old cochlear implant boys and 40 normal hearing peers with force plate. The main outcomes were displacement in posterior- anterior and medial-lateral planes, and mean speed with and without cognitive task and under on/off-device conditions. Caloric test was performed for CI users in order to examine the peripheral vestibular system. Results: Ninety-five percent of CI users showed caloric weakness. There were no significant differences in postural control parameters between groups. All performances deteriorated in the foam pad condition compared to the hard surface in all groups. Total mean velocity significantly increased during dual task in normal hearing group and in CI users with off-device. Conclusion: Although CI users had apparent vestibular disorders, their postural control in both single and dual-task conditions was identical to the normal peers. These effects can be attributed to the vestibular compensation that takes place during growing. Keywords: Balance; postural control; dual task; congenital hearing loss; cochlear implant

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