Speech Understanding in Complex Listening Environments by Listeners Fit With Cochlear Implants

Dorman, Michael F.; Gifford, René H.

doi:10.1044/2017_jslhr-h-17-0035

Cited by 50 publications

(36 citation statements)

References 42 publications

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“…The mean score in quiet was 82% correct; at 110 dB SNR, the mean score was 55% correct; and at 15 dB SNR, the mean score was 35% correct. In comparison, sentence understanding scores for normal hearing listeners are unaltered, relative to performance in quiet, by noise presented at 110 and 15 dB SNR (Dorman and Gifford, 2017).…”

mentioning

confidence: 81%

Speech Understanding and Sound Source Localization by Cochlear Implant Listeners Using a Pinna-Effect Imitating Microphone and an Adaptive Beamformer

2018

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The data support the use of the natural microphone setting as a default setting. The natural setting (1) provides better speech understanding in noise than the omni setting, (2) does not impair sound source localization, and (3) retains low-frequency sensitivity to signals from the rear. Moreover, bilateral CIs equipped with adaptive beamforming technology can engender speech understanding scores in noise that fall only a little short of scores for a single CI in quiet.

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confidence: 81%

Speech Understanding and Sound Source Localization by Cochlear Implant Listeners Using a Pinna-Effect Imitating Microphone and an Adaptive Beamformer

2018

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“…The impact of age on speech understanding in noise, independent of hearing loss, has yet to be characterized for these measures. In addition, though there are AzBio norms for young adults with normal hearing (25), age-normative data for older adults are not available. Consequently, CI users’ performance cannot be compared to age-normative references across a broad age span.…”

Section: Introductionmentioning

confidence: 99%

Speech Recognition in Noise for Adults With Normal Hearing: Age-Normative Performance for AzBio, BKB-SIN, and QuickSIN

Holder

Levin

Gifford

2018

Otology &Amp; Neurotology

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Objective: Characterize performance for adults aged 20 to 79 years with normal hearing on tasks of AzBio, BKB-SIN, QuickSIN, and acoustic Quick Spectral Modulation Detection (QSMD) in the sound field. Setting: Cochlear implant (CI) program. Patients: Eighty-one adults with normal hearing and cognitive function were recruited evenly across four age groups (20–49, 50–59, 60–69, and 70–79 years). Interventions: Subjects completed AzBio sentence recognition testing in quiet and in five signal-to-noise ratios (SNRs: +10, +5, 0, −5, −10 dB), as well as the BKB-SIN, QuickSIN, and QSMD tasks. Main Outcome Measures: AzBio, BKB-SIN, QuickSIN, and acoustic QSMD scores were analyzed to characterize typical sound field performance in an older adult population with normal hearing. Results: AzBio sentence recognition performance approached ceiling for sentences presented at ≥ 0 dB SNR with mean scores ranging from 3.5% at −10 dB SNR to 99% at +10 dB SNR. Mean QuickSIN SNR-50 was −0.02. Mean BKB-SIN SNR-50 was −1.31 dB. Mean acoustic QSMD score was 88%. Performance for all measures decreased with age. Conclusion: Adults with age-normative hearing achieve ceiling-level performance for AzBio sentence recognition at SNRs used for clinical CI and/or HA testing. Thus, these tasks are not inherently contraindicated for older listeners. Older adults with normal hearing, however, demonstrated greater deficits for speech in noise compared to younger listeners—an effect most pronounced at negative SNRs. Lastly, BKB-SIN data obtained in the sound field replicated previous normative data for only the youngest age group, suggesting that new norms should be considered for older populations.

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“…(1) aged 18 years or older, (2) known to have postlingual onset of profound deafness (> 4 years of age), (3) meet the Dutch criteria for CI implantation and (4) selected to receive a HIRes Ultra implant with HiFocus Midscala electrode array (Advanced Bionics, Sylmar, CA, USA). Exclusion criteria are (1) contraindications for magnetic resonance (MR) or computed tomography (CT) imaging, (2) cochlear or neural abnormalities that could compromise the placement of the electrode or affect outcome measures, (3) implementation of electricacoustic stimulation (EAS) within the first year of follow up, (4) previous or bilateral implantation of a CI and (5) additional disabilities that could prevent active trial participation.…”

Section: Methodsmentioning

confidence: 99%

“…CI performance appears to have reached a plateau in the last 30 years and despite an increase in scientific publications [2], a substantial number of challenges await future research. For example, a CI user's individual gradient of improvement is still hard to predict [3], disappointing outcomes remain hard to explain [4], speech perception in difficult listening situations remains extremely challenging for most CI users [5], and the quality of sound generated by CI stimulation is often considered unnatural and robotic despite decades of CI development [4,6].…”

Section: Introductionmentioning

confidence: 99%

Evaluating hearing performance with cochlear implants within the same patient using daily randomization and imaging-based fitting - The ELEPHANT study

Lambriks

Hoof

Debruyne

et al. 2020

Trials

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Background: Prospective research in the field of cochlear implants is hampered by methodological issues and small sample sizes. The ELEPHANT study presents an alternative clinical trial design with a daily randomized approach evaluating individualized tonotopical fitting of a cochlear implant (CI). Methods: A single-blinded, daily-randomized clinical trial will be implemented to evaluate a new imaging-based CI mapping strategy. A minimum of 20 participants will be included from the start of the rehabilitation process with a 1-year follow-up period. Based on a post-operative cone beam CT scan (CBCT), mapping of electrical input will be aligned to natural place-pitch arrangement in the individual cochlea. The CI's frequency allocation table will be adjusted to match the electrical stimulation of frequencies as closely as possible to corresponding acoustic locations in the cochlea. A randomization scheme will be implemented whereby the participant, blinded to the intervention allocation, crosses over between the experimental and standard fitting program on a daily basis, and thus effectively acts as his own control, followed by a period of free choice between both maps to incorporate patient preference. With this new approach the occurrence of a first-order carryover effect and a limited sample size is addressed. Discussion: The experimental fitting strategy is thought to give rise to a steeper learning curve, result in better performance in challenging listening situations, improve sound quality, better complement residual acoustic hearing in the contralateral ear and be preferred by recipients of a CI. Concurrently, the suitability of the novel trial design will be considered in investigating these hypotheses.

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Speech Understanding in Complex Listening Environments by Listeners Fit With Cochlear Implants

Abstract: http://cred.pubs.asha.org/article.aspx?articleid=2601622.

Cited by 50 publications

References 42 publications

Speech Understanding and Sound Source Localization by Cochlear Implant Listeners Using a Pinna-Effect Imitating Microphone and an Adaptive Beamformer

Speech Understanding and Sound Source Localization by Cochlear Implant Listeners Using a Pinna-Effect Imitating Microphone and an Adaptive Beamformer

Speech Recognition in Noise for Adults With Normal Hearing: Age-Normative Performance for AzBio, BKB-SIN, and QuickSIN

Evaluating hearing performance with cochlear implants within the same patient using daily randomization and imaging-based fitting - The ELEPHANT study

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