Clinical assessment of spectral modulation detection for adult cochlear implant recipients: A non-language based measure of performance outcomes

Gifford, René H.; Hedley-Williams, Andrea; Spahr, Anthony J.

doi:10.3109/14992027.2013.851800

Cited by 52 publications

(53 citation statements)

References 20 publications

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“…The sample size in this study is small, particularly at each age in years. Additionally, we used the QSMD task which was designed for and validated with adult listeners (Gifford, Hedley-Williams, et al 2014). The children were not trained on this task before testing, which may have influenced the youngest child’s chance performance, in particular.…”

Section: Discussionmentioning

confidence: 99%

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The Effects of Acoustic Bandwidth on Simulated Bimodal Benefit in Children and Adults with Normal Hearing

et al. 2016

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Objectives The primary purpose of this study was to examine the effect of acoustic bandwidth on bimodal benefit for speech recognition in normal-hearing children with a cochlear implant (CI) simulation in one ear and low-pass filtered stimuli in the contralateral ear. The effect of acoustic bandwidth on bimodal benefit in children was compared to the pattern of adults with normal hearing. Our hypothesis was that children would require a wider acoustic bandwidth than adults to 1) derive bimodal benefit, and 2) obtain asymptotic bimodal benefit. Design Nineteen children (6–12 years) and ten adults with normal hearing participated in the study. Speech recognition was assessed via recorded sentences presented in a 20-talker babble. The AzBio female-talker sentences were used for the adults and the pediatric AzBio sentences (BabyBio) were used for the children. A CI simulation was presented to the right ear and low-pass filtered stimuli were presented to the left ear with the following cutoff frequencies: 250 Hz, 500 Hz, 750 Hz, 1000, and 1500 Hz. Results The primary findings were 1) adults achieved higher performance than children when presented with only low-pass filtered acoustic stimuli, 2) adults and children performed similarly in all the simulated CI and bimodal conditions, 3) children gained significant bimodal benefit with the addition of low-pass filtered speech at 250 Hz, and 4) unlike previous studies completed with adult bimodal patients, adults and children with normal hearing gained additional significant bimodal benefit with cutoff frequencies up to 1500 Hz with most of the additional benefit gained with energy below 750 Hz. Conclusions Acoustic bandwidth effects on simulated bimodal benefit were similar in children and adults with normal hearing. Should the current results generalize to children with CIs, these results suggest pediatric CI recipients may derive significant benefit from minimal acoustic hearing (<250 Hz) in the non-implanted ear and increasing benefit with broader bandwidth. Knowledge of the effect of acoustic bandwidth on bimodal benefit in children may help direct clinical decisions regarding a second CI, continued bimodal hearing, and even optimizing acoustic amplification for the non-implanted ear.

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Section: Discussionmentioning

confidence: 99%

“…The SMD task was the Quick SMD, or QSMD, developed and validated by Gifford and colleagues (Gifford, Hedley-Williams, et al 2014). In brief, the QSMD included a three-interval, forced choice procedure based on a modified method of constant stimuli.…”

Section: Methodsmentioning

confidence: 99%

The Effects of Acoustic Bandwidth on Simulated Bimodal Benefit in Children and Adults with Normal Hearing

et al. 2016

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“…The test has been shown by multiple studies to be closely related to channel interaction and is clearly spectral in nature (Jones et al 2013a; Scheperle et al 2015; Won et al 2014a; Won et al 2011b). Related tests of spectral-ripple detection have also shown strong correlations with speech performance (Gifford et al 2014; Litvak et al 2007; Saoji et al 2009; Spahr et al 2011). Spectral-ripple discrimination is a reliable test (Drennan et al 2014; Won et al 2007) that is sensitive to acute processing changes in CI users (Drennan et al 2010).…”

Section: Introductionmentioning

confidence: 96%

“…Efficient and validated behavioral tests addressing sensitivity to clinically relevant acoustic attributes could serve as valuable clinical research tools, and, if made sufficiently efficient, as clinical tools (Drennan et al 2014; Gifford et al 2014; Shim et al 2014). These non-linguistic psychophysical tests could assess CI hearing ability acutely with limited acclimatization and less dependence on learning than speech tests.…”

Section: Introductionmentioning

confidence: 99%

Nonlinguistic Outcome Measures in Adult Cochlear Implant Users Over the First Year of Implantation

Drennan

Won

Timme³

et al. 2016

Ear &Amp; Hearing

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Objectives Post-lingually deaf cochlear implant users’ speech perception improves over several months after implantation due to a learning process which involves integration of the new acoustic information presented by the device. Basic tests of hearing acuity might evaluate sensitivity to the new acoustic information and be less sensitive to learning effects. It was hypothesized that, unlike speech perception, basic spectral and temporal discrimination abilities will not change over the first year of implant use. If there were limited change over time and the test scores were correlated with clinical outcome, the tests might be useful for acute diagnostic assessments of hearing ability and also useful for testing speakers of any language, many of which do not have validated speech tests. Design Ten newly implanted cochlear implant users were tested for speech understanding in quiet and in noise at 1 and 12 months post activation. Spectral-ripple discrimination, temporal-modulation detection, and Schroeder-phase discrimination abilities were evaluated at 1, 3, 6, 9 and 12 months post activation. Results Speech understanding in quiet improved between 1 and 12 months post activation (mean 8% improvement). Speech in noise performance showed no statistically significant improvement. Mean spectral-ripple discrimination thresholds and temporal-modulation detection thresholds for modulation frequencies of 100 Hz and above also showed no significant improvement. Spectral-ripple discrimination thresholds were significantly correlated with speech understanding. Low frequency modulation detection and Schroeder-phase discrimination abilities improved over the period. Individual learning trends varied, but the majority of listeners followed the same stable pattern as group data. Conclusions Spectral-ripple discrimination ability and temporal-modulation detection at 100-Hz modulation and above might serve as a useful diagnostic tool for early acute assessment of cochlear implant outcome for listeners speaking any native language.

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“…These efforts could involve developing processing algorithms that emphasize that kind of structure, as well as diagnostic and mapping procedures that evaluate how well that kind of structure is being represented. New diagnostic tools, such as spectral modulation detection, might help meet this goal (e.g., Gifford et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Speech perception of sine-wave signals by children with cochlear implants

Nittrouer

Kuess

Lowenstein

2015

The Journal of the Acoustical Society of America

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Children need to discover linguistically meaningful structures in the acoustic speech signal. Being attentive to recurring, time-varying formant patterns helps in that process. However, that kind of acoustic structure may not be available to children with cochlear implants (CIs), thus hindering development. The major goal of this study was to examine whether children with CIs are as sensitive to time-varying formant structure as children with normal hearing (NH) by asking them to recognize sine-wave speech. The same materials were presented as speech in noise, as well, to evaluate whether any group differences might simply reflect general perceptual deficits on the part of children with CIs. Vocabulary knowledge, phonemic awareness, and "top-down" language effects were all also assessed. Finally, treatment factors were examined as possible predictors of outcomes. Results showed that children with CIs were as accurate as children with NH at recognizing sine-wave speech, but poorer at recognizing speech in noise. Phonemic awareness was related to that recognition. Top-down effects were similar across groups. Having had a period of bimodal stimulation near the time of receiving a first CI facilitated these effects. Results suggest that children with CIs have access to the important time-varying structure of vocal-tract formants.

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Clinical assessment of spectral modulation detection for adult cochlear implant recipients: A non-language based measure of performance outcomes

Cited by 52 publications

References 20 publications

The Effects of Acoustic Bandwidth on Simulated Bimodal Benefit in Children and Adults with Normal Hearing

The Effects of Acoustic Bandwidth on Simulated Bimodal Benefit in Children and Adults with Normal Hearing

Nonlinguistic Outcome Measures in Adult Cochlear Implant Users Over the First Year of Implantation

Speech perception of sine-wave signals by children with cochlear implants

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