Effect of degraded binaural cues in cochlear implant users and normal hearing listeners on spatial release from masking

2012 ◽  
Vol 131 (4) ◽  
pp. 3340-3340
Author(s):  
Ruth Litovsky ◽  
Matthew Goupell ◽  
Alan Kan ◽  
Sara Misurelli ◽  
Corey Stoelb
Keyword(s):  
Cochlear Implant ◽  
Normal Hearing ◽  
Binaural Cues ◽  
Spatial Release ◽  
Release From Masking

Spatial Release From Masking in Pediatric Cochlear Implant Recipients With Single-Sided Deafness

2021 ◽  
pp. 1-9
Author(s):  
Lisa R. Park ◽  
Margaret T. Dillon ◽  
Emily Buss ◽  
Brendan P. O'Connell ◽  
Kevin D. Brown
Keyword(s):  
Speech Recognition ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Repeated Measures ◽  
Case Reports ◽  
Recognition Task ◽  
Normal Hearing ◽  
Spatial Release ◽  
Release From Masking ◽  
Single Sided Deafness

Purpose Children with single-sided deafness (SSD) experience difficulty understanding speech in multisource listening situations. Case reports and retrospective studies have indicated that a cochlear implant (CI) may improve masked speech recognition in children with SSD. This prospective study was conducted to determine whether providing a CI to children with SSD supports spatial release from masking (SRM), an improvement in speech recognition associated with separating the target and masker sources. Method Twenty children with at least a moderate-to-profound hearing loss in one ear and normal hearing in the contralateral ear underwent cochlear implantation. The average age of implantation was 5.5 years (range: 3.5–12.7). After 12 months of CI use, subjects completed a sentence recognition task in multitalker masker with and without the CI. The target was presented from the front, and the masker was either colocated with the target (0°) or from the side (+90° or −90°). A two-way repeated-measures analysis of variance was completed to investigate SRM with and without the CI. Results Pediatric CI recipients experienced significant SRM when the masker was directed to the normal-hearing ear or to the affected ear. Conclusions The results indicate that cochlear implantation in children with SSD supports binaural skills required for speech recognition in noise. These results are consistent with improved functional communication in multisource environments, like classrooms.

scholarly journals Spatial Release From Masking in Simulated Cochlear Implant Users With and Without Access to Low-Frequency Acoustic Hearing

2015 ◽  
Vol 19 ◽  
pp. 233121651561694 ◽  
Author(s):  
Ben Williges ◽  
Mathias Dietz ◽  
Volker Hohmann ◽  
Tim Jürgens
Keyword(s):  
Cochlear Implant ◽  
Low Frequency ◽  
Spatial Release ◽  
Acoustic Hearing ◽  
Release From Masking

Spatial Release From Masking in Bimodal and Bilateral Pediatric Cochlear Implant Recipients

2020 ◽  
pp. 1-9
Author(s):  
Kaylene King ◽  
Margaret T. Dillon ◽  
Brendan P. O'Connell ◽  
Kevin D. Brown ◽  
Lisa R. Park
Keyword(s):  
Cochlear Implant ◽  
Multiple Regression ◽  
Recognition Performance ◽  
Regression Analyses ◽  
Sentence Recognition ◽  
Spatial Release ◽  
The Difference ◽  
Release From Masking ◽  
Device Use ◽  
Clinical Measures

Purpose Traditional clinical measures of cochlear implant (CI) recipient performance may not fully evaluate the benefit of bimodal listening (hearing aid contralateral to a CI). The clinical assessment of spatial release from masking (SRM) may be a sensitive measure of the benefit of listening with bimodal stimulation. This study compared the SRM of pediatric bimodal and bilateral CI listeners using a clinically feasible method, and investigated variables that may contribute to speech recognition performance with spatially separated maskers. Method Forty pediatric bimodal ( N = 20) and bilateral CI ( N = 20) participants were assessed in their best aided listening condition on sentence recognition in a four-talker masker. Testing was completed with target and masker colocated at 0° azimuth, and with the masker directed at 90° to either ear. SRM was calculated as the difference in performance between the colocated and each 90° condition. A two-way mixed-methods analysis of variance was used to compare performance between groups in the three masker conditions. Multiple regression analyses were conducted to investigate potential predictors for SRM asymmetry including hearing history, unaided thresholds, word recognition, duration of device use, and acoustic bandwidth. Results Both groups demonstrated SRM, with significantly better recognition in each 90° condition as compared to the colocated condition. The groups did not differ significantly in SRM. The multiple regression analyses did not reveal any significant predictors of SRM asymmetry. Conclusions Bimodal and bilateral CI listeners demonstrated similar amounts of SRM. While no specific variables predicted SRM asymmetry in bimodal listeners, pediatric bimodal and bilateral CI recipients should expect similar amounts of SRM regardless of the side of the masker. SRM asymmetry in pediatric bimodal listeners may signal a need for consideration of a second CI.

scholarly journals Spatial release from masking in normal-hearing children and children who use hearing aids

2011 ◽  
Vol 129 (1) ◽  
pp. 368-375 ◽  
Author(s):  
Teresa Y. C. Ching ◽  
Emma van Wanrooy ◽  
Harvey Dillon ◽  
Lyndal Carter
Keyword(s):  
Hearing Aids ◽  
Normal Hearing ◽  
Spatial Release ◽  
Release From Masking ◽  
Hearing Children

Speech Recognition With Informational and Energetic Maskers in Patients With Single-Sided Deafness After Cochlear Implantation

2021 ◽  
pp. 1-14
Author(s):  
Verena Müller ◽  
Ruth Lang-Roth
Keyword(s):  
Speech Recognition ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Informational Masking ◽  
Slight Improvement ◽  
Spatial Release ◽  
Contralateral Ear ◽  
Release From Masking ◽  
Single Sided Deafness ◽  
Competing Speech

Purpose The aim of the study was to assess the susceptibility to energetic and informational masking in patients with single-sided deafness (SSD) with one normal-hearing (NH) ear and a cochlear implant (CI) in the contralateral ear, understand the effect on speech recognition when spatially separating noise and speech maskers, and investigate the influence of the CI in situations with energetic and informational masking. Method Speech recognition was measured in the presence of either a modulated speech-shaped noise or one of two competing speech maskers in 11 SSD-CI listeners. The speech maskers were manipulated with respect to fundamental frequency to consider the effect of different voices. Measurements were conducted in the unaided (NH) and aided (NHCI) conditions. Spatial release from masking (SRM) was calculated for each masker type and both listening conditions (NH and NHCI) by subtracting scores of the colocated target and masker condition (S 0 N 0 ) from the spatially separated target and masker conditions (S 0 N ≠0 ). Results Speech recognition was highly variable depending on the type of masker. SRM occurred in the unaided (NH) and aided (NHCI) conditions when the speech masker had the same gender as the target talker. Adding the CI improved speech recognition when this speech masker was ipsilateral to the NH ear. Conclusions The amount of informational masking is substantial in SSD-CI listeners with both colocated and spatially separated target and masker signals. The contribution of SRM to better speech recognition largely depends on the masker and is considerable when no differences in voices between the target and the competing talker occur. There is only a slight improvement in speech recognition by adding the CI.

scholarly journals The impact of cochlear implant microphone settings on the binaural hearing of experienced cochlear implant users with single-sided deafness

2020 ◽  
Author(s):  
Anja Kurz ◽  
Maren Zanzinger ◽  
Rudolf Hagen ◽  
Kristen Rak
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Binaural Hearing ◽  
Sound Quality ◽  
Noise Sources ◽  
Shadow Effect ◽  
Spatial Release ◽  
Release From Masking ◽  
Single Sided Deafness ◽  
The Impact

Abstract Objective Cochlear implantation has become a well-accepted treatment option for people with single-sided deafness (SSD) and has become a clinical standard in many countries. A cochlear implant (CI) is the only device which restores binaural hearing. The effect of microphone directionality (MD) settings has been investigated in other CI indication groups, but its impact on speech perception in noise has not been established in CI users with SSD. The focus of this investigation was, therefore, to assess binaural hearing effects using different MD settings in CI users with SSD. Methods Twenty-nine experienced CI users with SSD were recruited to determine speech reception thresholds with varying target and noise sources to define binaural effects (head shadow, squelch, summation, and spatial release from masking), sound localization, and sound quality using the SSQ12 and HISQUI19 questionnaires. Outcome measures included the MD settings “natural”, “adaptive”, and “omnidirectional”. Results The 29 participants involved in the study were divided into two groups: 11 SONNET users and 18 OPUS 2/RONDO users. In both groups, a significant head shadow effect of 7.4–9.2 dB was achieved with the CI. The MD setting “adaptive” provided a significant head shadow effect of 9.2 dB, a squelch effect of 0.9 dB, and spatial release from masking of 7.6 dB in the SONNET group. No significant summation effect could be determined in either group with CI. Outcomes with the omnidirectional setting were not significantly different between groups. For both groups, localization improved significantly when the CI was activated and was best when the omnidirectional setting was used. The groups’ sound quality scores did not significantly differ. Conclusions Adaptive directional microphone settings improve speech perception and binaural hearing abilities in CI users with SSD. Binaural effect measures are valuable to quantify the benefit of CI use, especially in this indication group.

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