Binaural masking level differences in actual and simulated bilateral cochlear implant listeners
At present commercially available bilateral cochlear implants (CIs) improve their users' speech understanding in noise but they employ two independent speech processors that cannot provide accurate and appropriate interaural level and time differences as seen binaurally in normal hearing (NH) l...
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| Veröffentlicht in: | The Journal of the Acoustical Society of America 2010-03, Vol.127 (3), p.1479-1490 |
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| creator | Lu, Thomas Litovsky, Ruth Zeng, Fan-Gang |
| description | At present commercially available bilateral cochlear implants (CIs) improve their users' speech understanding in noise but they employ two independent speech processors that cannot provide accurate and appropriate interaural level and time differences as seen binaurally in normal hearing (NH) listeners. Previous work suggests that binaural cues are accessible to bilateral CI users when presented to single pairs of pitch-matched electrodes, but the scope was limited and the mechanisms remained unclear. In this study, binaural masking level differences (BMLDs) were measured in five bilateral Nucleus-24 CI users over multiple pairs of pitch-matched electrodes. Average BMLD was
4.6
±
4.9
dB
, but large individual variability prevented significance
(
p
=
0.09
)
. Considering just the 125 Hz condition, as in previous work, phase (N0S0 vs
N
0
S
π
) and electrode effects were significant. Compared with simulated bilateral CI users, actual bilateral CI users had proportionally higher thresholds for
N
0
S
π
than N0S0. Together the present results suggest that the performance gap in BMLDs between CI and NH listeners is not due to a lack of sufficient acoustic cues in the temporal envelope domain but to a true binaural deficit related to a central mechanism in deprived binaural processing. |
| doi_str_mv | 10.1121/1.3290994 |
| format | Article |
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4.6
±
4.9
dB
, but large individual variability prevented significance
(
p
=
0.09
)
. Considering just the 125 Hz condition, as in previous work, phase (N0S0 vs
N
0
S
π
) and electrode effects were significant. Compared with simulated bilateral CI users, actual bilateral CI users had proportionally higher thresholds for
N
0
S
π
than N0S0. Together the present results suggest that the performance gap in BMLDs between CI and NH listeners is not due to a lack of sufficient acoustic cues in the temporal envelope domain but to a true binaural deficit related to a central mechanism in deprived binaural processing.</description><identifier>ISSN: 0001-4966</identifier><identifier>EISSN: 1520-8524</identifier><identifier>DOI: 10.1121/1.3290994</identifier><identifier>PMID: 20329848</identifier><identifier>CODEN: JASMAN</identifier><language>eng</language><publisher>Melville, NY: Acoustical Society of America</publisher><subject>Acoustic Stimulation ; Adult ; Audition ; Auditory Threshold - physiology ; Biological and medical sciences ; Cochlear Implants ; Cochlear Nerve - physiology ; Cues ; Diseases of the ear ; Ent and stomatology ; Fundamental and applied biological sciences. Psychology ; Humans ; Medical sciences ; Noise ; Perception ; Perceptual Masking - physiology ; Psychoacoustics ; Psychological Acoustics ; Psychology. Psychoanalysis. Psychiatry ; Psychology. Psychophysiology ; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) ; Sensory Deprivation - physiology ; Sound Localization - physiology ; Young Adult</subject><ispartof>The Journal of the Acoustical Society of America, 2010-03, Vol.127 (3), p.1479-1490</ispartof><rights>2010 Acoustical Society of America</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2010 Acoustical Society of America 2010 Acoustical Society of America</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c523t-89c5ef212f4c8baa0bdfdd72e3db9a67c83eab6babd893956bc9fee2a9d7ccc63</citedby><cites>FETCH-LOGICAL-c523t-89c5ef212f4c8baa0bdfdd72e3db9a67c83eab6babd893956bc9fee2a9d7ccc63</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/jasa/article-lookup/doi/10.1121/1.3290994$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>207,208,230,314,780,784,794,885,1565,4512,27924,27925,76384</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22585381$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20329848$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lu, Thomas</creatorcontrib><creatorcontrib>Litovsky, Ruth</creatorcontrib><creatorcontrib>Zeng, Fan-Gang</creatorcontrib><title>Binaural masking level differences in actual and simulated bilateral cochlear implant listeners</title><title>The Journal of the Acoustical Society of America</title><addtitle>J Acoust Soc Am</addtitle><description>At present commercially available bilateral cochlear implants (CIs) improve their users' speech understanding in noise but they employ two independent speech processors that cannot provide accurate and appropriate interaural level and time differences as seen binaurally in normal hearing (NH) listeners. Previous work suggests that binaural cues are accessible to bilateral CI users when presented to single pairs of pitch-matched electrodes, but the scope was limited and the mechanisms remained unclear. In this study, binaural masking level differences (BMLDs) were measured in five bilateral Nucleus-24 CI users over multiple pairs of pitch-matched electrodes. Average BMLD was
4.6
±
4.9
dB
, but large individual variability prevented significance
(
p
=
0.09
)
. Considering just the 125 Hz condition, as in previous work, phase (N0S0 vs
N
0
S
π
) and electrode effects were significant. Compared with simulated bilateral CI users, actual bilateral CI users had proportionally higher thresholds for
N
0
S
π
than N0S0. Together the present results suggest that the performance gap in BMLDs between CI and NH listeners is not due to a lack of sufficient acoustic cues in the temporal envelope domain but to a true binaural deficit related to a central mechanism in deprived binaural processing.</description><subject>Acoustic Stimulation</subject><subject>Adult</subject><subject>Audition</subject><subject>Auditory Threshold - physiology</subject><subject>Biological and medical sciences</subject><subject>Cochlear Implants</subject><subject>Cochlear Nerve - physiology</subject><subject>Cues</subject><subject>Diseases of the ear</subject><subject>Ent and stomatology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Noise</subject><subject>Perception</subject><subject>Perceptual Masking - physiology</subject><subject>Psychoacoustics</subject><subject>Psychological Acoustics</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Psychology. Psychophysiology</subject><subject>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</subject><subject>Sensory Deprivation - physiology</subject><subject>Sound Localization - physiology</subject><subject>Young Adult</subject><issn>0001-4966</issn><issn>1520-8524</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkUtrFTEUgIMo9ra68A_IbES6mJrHZCbZCLX4goIbXYczyZk2mslck0zBf28unba6EMzmEPKdVz5CXjB6xhhnb9iZ4Jpq3T0iOyY5bZXk3WOyo5SyttN9f0SOc_5er1IJ_ZQccVoTVKd2xLzzEdYEoZkh__Dxqgl4g6FxfpowYbSYGx8bsGWtDETXZD-vAQq6ZvSHeMi1i70OCKnx8z5ALE3wuWDElJ-RJxOEjM-3eEK-fXj_9eJTe_nl4-eL88vWSi5Kq7SVOHHGp86qEYCObnJu4CjcqKEfrBIIYz_C6JQWWvaj1RMiB-0Ga20vTsjb27r7dZzRWYylDmb2yc-QfpkFvPn7Jfprc7XcGK5kLxmvBV5vBdLyc8VczOyzxVDXwWXNZugOh8rhP0ghVd_1upKnt6RNS84Jp_t5GDUHc4aZzVxlX_65wD15p6oCrzYAsoUwJYjW5weOSyWFYg8_ka0vUPwS_931Tr7Z5JsqX_wGmpS5jA</recordid><startdate>20100301</startdate><enddate>20100301</enddate><creator>Lu, Thomas</creator><creator>Litovsky, Ruth</creator><creator>Zeng, Fan-Gang</creator><general>Acoustical Society of America</general><general>American Institute of Physics</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7T9</scope><scope>5PM</scope></search><sort><creationdate>20100301</creationdate><title>Binaural masking level differences in actual and simulated bilateral cochlear implant listeners</title><author>Lu, Thomas ; Litovsky, Ruth ; Zeng, Fan-Gang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c523t-89c5ef212f4c8baa0bdfdd72e3db9a67c83eab6babd893956bc9fee2a9d7ccc63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Acoustic Stimulation</topic><topic>Adult</topic><topic>Audition</topic><topic>Auditory Threshold - physiology</topic><topic>Biological and medical sciences</topic><topic>Cochlear Implants</topic><topic>Cochlear Nerve - physiology</topic><topic>Cues</topic><topic>Diseases of the ear</topic><topic>Ent and stomatology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Medical sciences</topic><topic>Noise</topic><topic>Perception</topic><topic>Perceptual Masking - physiology</topic><topic>Psychoacoustics</topic><topic>Psychological Acoustics</topic><topic>Psychology. Psychoanalysis. Psychiatry</topic><topic>Psychology. Psychophysiology</topic><topic>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</topic><topic>Sensory Deprivation - physiology</topic><topic>Sound Localization - physiology</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lu, Thomas</creatorcontrib><creatorcontrib>Litovsky, Ruth</creatorcontrib><creatorcontrib>Zeng, Fan-Gang</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Linguistics and Language Behavior Abstracts (LLBA)</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>The Journal of the Acoustical Society of America</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lu, Thomas</au><au>Litovsky, Ruth</au><au>Zeng, Fan-Gang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Binaural masking level differences in actual and simulated bilateral cochlear implant listeners</atitle><jtitle>The Journal of the Acoustical Society of America</jtitle><addtitle>J Acoust Soc Am</addtitle><date>2010-03-01</date><risdate>2010</risdate><volume>127</volume><issue>3</issue><spage>1479</spage><epage>1490</epage><pages>1479-1490</pages><issn>0001-4966</issn><eissn>1520-8524</eissn><coden>JASMAN</coden><abstract>At present commercially available bilateral cochlear implants (CIs) improve their users' speech understanding in noise but they employ two independent speech processors that cannot provide accurate and appropriate interaural level and time differences as seen binaurally in normal hearing (NH) listeners. Previous work suggests that binaural cues are accessible to bilateral CI users when presented to single pairs of pitch-matched electrodes, but the scope was limited and the mechanisms remained unclear. In this study, binaural masking level differences (BMLDs) were measured in five bilateral Nucleus-24 CI users over multiple pairs of pitch-matched electrodes. Average BMLD was
4.6
±
4.9
dB
, but large individual variability prevented significance
(
p
=
0.09
)
. Considering just the 125 Hz condition, as in previous work, phase (N0S0 vs
N
0
S
π
) and electrode effects were significant. Compared with simulated bilateral CI users, actual bilateral CI users had proportionally higher thresholds for
N
0
S
π
than N0S0. Together the present results suggest that the performance gap in BMLDs between CI and NH listeners is not due to a lack of sufficient acoustic cues in the temporal envelope domain but to a true binaural deficit related to a central mechanism in deprived binaural processing.</abstract><cop>Melville, NY</cop><pub>Acoustical Society of America</pub><pmid>20329848</pmid><doi>10.1121/1.3290994</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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| source | MEDLINE; AIP Journals Complete; Acoustical Society of America (AIP); Alma/SFX Local Collection |
| subjects | Acoustic Stimulation Adult Audition Auditory Threshold - physiology Biological and medical sciences Cochlear Implants Cochlear Nerve - physiology Cues Diseases of the ear Ent and stomatology Fundamental and applied biological sciences. Psychology Humans Medical sciences Noise Perception Perceptual Masking - physiology Psychoacoustics Psychological Acoustics Psychology. Psychoanalysis. Psychiatry Psychology. Psychophysiology Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) Sensory Deprivation - physiology Sound Localization - physiology Young Adult |
| title | Binaural masking level differences in actual and simulated bilateral cochlear implant listeners |
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