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Characterization of Cochlear Implant...

Deshpande, Shruti.

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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:	Electronic resources : Monograph/item
Title/Author:	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./
Author:	Deshpande, Shruti.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2014,
Description:	177 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
Contained By:	Dissertation Abstracts International76-02B(E).
Subject:	Audiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3639073
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. - Ann Arbor : ProQuest Dissertations & Theses, 2014 - 177 p.

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

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

This item is not available from ProQuest Dissertations & Theses.

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.

ISBN: 9781321232974Subjects--Topical Terms:

537237
Audiology.

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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100 1 $a Deshpande, Shruti. $3 3346055
245 1 0 $a 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.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2014
300 $a 177 p.
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.
506 $a This item is not available from ProQuest Dissertations & Theses.
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.
590 $a School code: 0045.
650 4 $a Audiology. $3 537237
690 $a 0300
710 2 $a University of Cincinnati. $b Communication Sciences and Disorders. $3 3285706
773 0 $t Dissertation Abstracts International $g 76-02B(E).
790 $a 0045
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3639073