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Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) : = A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) :/
Reminder of title:	A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box.
Author:	Deshpande, Shruti.
Description:	1 online resource (177 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
Subject:	Audiology. -
Online resource:	click for full text (PQDT)
ISBN:	9781321232974

Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) : = A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box.
Deshpande, Shruti.

Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) :A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box. - 1 online resource (177 pages)

Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.

Thesis (Ph.D.)--University of Cincinnati, 2014.

Includes bibliographical references

Purpose: Recent work has investigated the use of electric stimuli to evoke auditory steady state responses (ASSR) in cochlear implant (CI) recipients. While more control can be exerted using electric stimuli, acoustic stimuli present natural listening environment for CI users. However, ASSR using acoustic stimuli in the presence of a CI could lead to artifacts. The purpose of this project was to study the characteristics of cochlear implant-related artifacts during sound-field recording of the ASSR. Studying the characteristics of the CI-related artifacts by comparing them with physiological responses from normal hearing participants is an essential step toward the development of signal processing strategies to eliminate/control the artifacts.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781321232974Subjects--Topical Terms:

889171
Audiology.
Index Terms--Genre/Form:

554714
Electronic books.

Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) : = A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box.
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245 1 0 $a Characterization of Cochlear Implant related Artifact during Sound-Field Recording of the Auditory Steady State Response (ASSR) : $b A Comparison between Normal Hearing Adults, Cochlear Implant Recipients and Implant-in-a-Box.
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500 $a Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
500 $a Adviser: Robert W. Keith.
502 $a Thesis (Ph.D.)--University of Cincinnati, 2014.
504 $a Includes bibliographical references
520 $a Purpose: Recent work has investigated the use of electric stimuli to evoke auditory steady state responses (ASSR) in cochlear implant (CI) recipients. While more control can be exerted using electric stimuli, acoustic stimuli present natural listening environment for CI users. However, ASSR using acoustic stimuli in the presence of a CI could lead to artifacts. The purpose of this project was to study the characteristics of cochlear implant-related artifacts during sound-field recording of the ASSR. Studying the characteristics of the CI-related artifacts by comparing them with physiological responses from normal hearing participants is an essential step toward the development of signal processing strategies to eliminate/control the artifacts.
520 $a Design: Five experiments in the present study investigated the characteristics of CI artifacts during sound-field recording of the ASSR using an amplitude modulated (AM) stimulus. Experiment 1 investigated differences between ten normal hearing (NH) participants and ten CI ears in terms of ASSR amplitude versus intensity and onset phase versus intensity. Experiment 2 explored the amplitude versus intensity and onset phase versus intensity relationships for an implant-in-a-box. This investigation allowed the study of the characteristics of CI-related artifacts without physiological components introduced by the human CI user. Experiment 3 investigated correlations between electrophysiological ASSR thresholds and behavioral thresholds to AM stimuli (BTAM) for the NH versus the CI groups. Mean threshold differences were computed to in order to study group differences. Experiment 4 investigated the presence of transducer-related artifacts during ASSR recording in two normal hearing participants via masking. Experiment 5 investigated the effect of manipulation of intensity and external components of the CI on the ASSR recordings in three CI users.
520 $a Results: Experiment 1 indicated that there were significant differences between the NH and CI groups in terms of amplitude as well as onset phase across intensities on the repeated measures ANOVA. However, the amplitude versus intensity and the onset phase versus intensity slopes for the two groups were not significantly different. Experiment 2 indicated that the slope of the onset phase as a function of stimulus intensity was -0.04 degrees/decibel. The onset phase versus intensity slope of approximately zero probably indicates the almost instantaneous activation of the CI circuitry. Experiment 3 indicated significant differences between the NH and CI groups in terms of their mean threshold difference. However, significant correlations were obtained between electrophysiological ASSR thresholds and BTAM for each group. Implications of these results are systematically analyzed. Experiment 4 indicated that transducer-related artifacts due to aliasing were not detected in this study. Experiment 5 indicated that the CI-related artifacts were detected only when the participants' CI was ON and when acoustic energy was available to be processed by the cochlear implant.
520 $a Conclusions: The present study provides the first comprehensive description of the characteristics of the cochlear implant-related artifacts using acoustic stimuli. Implications for future research to further characterize the artifacts, thereby leading to signal processing strategies to minimize them are discussed.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Audiology. $3 889171
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a University of Cincinnati. $b Communication Sciences and Disorders. $3 1185257
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