Changes in children's speech discrimination and spatial release from masking between 2 and 4 years after sequential cochlear implantation

Killan, Catherine F.; Killan, Edward C.; Raine, Christopher

doi:10.1179/1754762815y.0000000001

Cited by 10 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The negative relationship between SRTs in the BiCI group in the Separated condition and bilateral experience suggests that having more hearing experience may facilitate the ability to select the target word in the presence of competing speech, when spatial cues were available as a segregation cue. The current findings are consistent with prior reports in older bilaterally implanted children, noting a general improvement in speech discrimination scores with experience ( Killan et al., 2015 ; Peters, Litovsky, Parkinson, & Lake, 2007 ; Sparreboom, Snik, & Mylanus, 2011 ; Strøm-Roum, Laurent, & Wie, 2012 ).…”

Section: Discussionsupporting

confidence: 92%

“…In the studies on bilaterally implanted children, most of the children were sequentially implanted; hence, the children first experienced several years of unilateral listening and subsequently transitioned to having bilateral hearing. Some studies report that SRM in these children has been smaller than SRM measured in NH children who are matched for chronological age or hearing age ( Misurelli & Litovsky, 2012 ; Mok, Galvin, Dowell, & McKay, 2010 ; Murphy, Summerfield, O’Donoghue, & Moore, 2011 ), and recent work suggests that SRM in implanted children improves with additional listening experience ( Killan, Killan, & Raine, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Release From Masking in 2-Year-Olds With Normal Hearing and With Bilateral Cochlear Implants

2018

View full text Add to dashboard Cite

This study evaluated spatial release from masking (SRM) in 2- to 3-year-old children who are deaf and were implanted with bilateral cochlear implants (BiCIs), and in age-matched normal-hearing (NH) toddlers. Here, we examined whether early activation of bilateral hearing has the potential to promote SRM that is similar to age-matched NH children. Listeners were 13 NH toddlers and 13 toddlers with BiCIs, ages 27 to 36 months. Speech reception thresholds (SRTs) were measured for target speech in front (0°) and for competitors that were either Colocated in front (0°) or Separated toward the right (+90°). SRM was computed as the difference between SRTs in the front versus in the asymmetrical condition. Results show that SRTs were higher in the BiCI than NH group in all conditions. Both groups had higher SRTs in the Colocated and Separated conditions compared with Quiet, indicating masking. SRM was significant only in the NH group. In the BiCI group, the group effect of SRM was not significant, likely limited by the small sample size; however, all but two children had SRM values within the NH range. This work shows that to some extent, the ability to use spatial cues for source segregation develops by age 2 to 3 in NH children and is attainable in most of the children in the BiCI group. There is potential for the paradigm used here to be used in clinical settings to evaluate outcomes of bilateral hearing in very young children.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Spatial Release From Masking in 2-Year-Olds With Normal Hearing and With Bilateral Cochlear Implants

2018

View full text Add to dashboard Cite

show abstract

“…Measures of speech detection allowed testing of children with wide ranges of age, native language, and developmental ability but detection is an easier task than speech recognition. This explains the lower SNR levels in this study compared to the −9 to +7 dB SNR speech recognition thresholds reported for children with normal hearing 55,56 or CIs 39,44,45,57 . The ability to detect and understand speech in noisy conditions improves with age 33,55,56 as the auditory system matures.…”

Section: Discussioncontrasting

confidence: 55%

Limiting asymmetric hearing improves benefits of bilateral hearing in children using cochlear implants

Polonenko

Papsin

Gordon

2018

Sci Rep

View full text Add to dashboard Cite

Neurodevelopmental changes occur with asymmetric hearing loss, limiting binaural/spatial hearing and putting children at risk for social and educational challenges. These deficits may be mitigated by providing bilateral hearing in children through auditory prostheses. Effects on speech perception and spatial hearing were measured in a large cohort of >450 children who were deaf and used bilateral cochlear implants or bimodal devices (one cochlear implant and a contralateral hearing aid). Results revealed an advantage of bilateral over unilateral device use but this advantage decreased as hearing in the two ears became increasingly asymmetric. Delayed implantation of an ear with severe to profound deafness allowed asymmetric hearing, creating aural preference for the better hearing ear. These findings indicate that bilateral input with the most appropriate device for each ear should be provided early and without delay during development.

show abstract

“…The auditory histories of the children with CIs comprise a period of auditory deprivation and experience with only degraded speech signals, which potentially may affect the rate of auditory development. The developmental trend in this study is similar to the finding of a relationship between age (or CI experience) and speech detection/discrimination thresholds in noise in children with CIs (Chadha et al, 2011;Killan et al, 2015).…”

Section: A Signal Detection Thresholds and Bmldssupporting

confidence: 74%

Binaural release from masking with single- and multi-electrode stimulation in children with cochlear implants

Todd

Goupell

Litovsky

2016

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Cochlear implants (CIs) provide children with access to speech information from a young age. Despite bilateral cochlear implantation becoming common, use of spatial cues in free field is smaller than in normal-hearing children. Clinically fit CIs are not synchronized across the ears; thus binaural experiments must utilize research processors that can control binaural cues with precision. Research to date has used single pairs of electrodes, which is insufficient for representing speech. Little is known about how children with bilateral CIs process binaural information with multielectrode stimulation. Toward the goal of improving binaural unmasking of speech, this study evaluated binaural unmasking with multi-and single-electrode stimulation. Results showed that performance with multi-electrode stimulation was similar to the best performance with singleelectrode stimulation. This was similar to the pattern of performance shown by normal-hearing adults when presented an acoustic CI simulation. Diotic and dichotic signal detection thresholds of the children with CIs were similar to those of normal-hearing children listening to a CI simulation. The magnitude of binaural unmasking was not related to whether the children with CIs had good interaural time difference sensitivity. Results support the potential for benefits from binaural hearing and speech unmasking in children with bilateral CIs.

show abstract

Changes in children's speech discrimination and spatial release from masking between 2 and 4 years after sequential cochlear implantation

Cited by 10 publications

References 22 publications

Spatial Release From Masking in 2-Year-Olds With Normal Hearing and With Bilateral Cochlear Implants

Spatial Release From Masking in 2-Year-Olds With Normal Hearing and With Bilateral Cochlear Implants

Limiting asymmetric hearing improves benefits of bilateral hearing in children using cochlear implants

Binaural release from masking with single- and multi-electrode stimulation in children with cochlear implants

Contact Info

Product

Resources

About