Analysis of outcomes for communication mode in cochlear implant in prelingually deafened adults

Oyamada, Shogo; Takahashi, Masahiro; Furutate, Sakiko; Oka, Shinichirou; Kubota, Eri; Sakurai, Azusa; Uekusa, Tomoko; Iwasaki, Satoshi

doi:10.1016/j.anl.2022.05.017

Cited by 1 publication

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“…청자의 소음하 공간청취 능력, 위치분리혜택을 평가하기 위 해 객관적 혹은 주관적 평가 도구를 활용할 수 있다. 예를 들 어 수평면 혹은 수직면에 설치한 여러 음장스피커를 통해 소 리위치분별(sound localization)을 측정하거나 목표 어음 과 소음 간 위치가 분리된(spatially separated) 소음하 어음 인지검사 등을 객관적 검사로 시행할 수 있다 (Corbin et al, www.e-asr.org WW Jung et al 2021;Firszt et al, 2017;Nelson et al, 2019;Oyamada et al, 2023;Rothpletz et al, 2012). 객관적 공간청취검 사가 어려운 경우 신뢰도와 타당도가 검증된 자가보고 설 문 도구를 통해 난청인의 공간청취 어려움을 주관적으로 평 가할 수 있다 ( Jung et al, 2023b;Noble et al, 2008;Perreau et al, 2014;Zhang et al, 2015).…”

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Objective and Subjective Measures of Spatial Hearing in Unilateral Cochlear Implant Users with Bilateral Profound Hearing Loss

Jung,

Han,

Lee

2024

Audiol Speech Res

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Purpose: The ability to benefit from spatial separation between target and masker signals is important in multi-sound source listening environments. The goal of this study was to measure the spatial release from masking (SRM) in unilateral cochlear implant (CI) users with bilateral profound hearing loss. We also determined the relationships between the SRMs and the self-reported spatial hearing abilities.Methods: Fourteen unilateral CI users with bilateral profound hearing loss participated in this study. The target sentence was always presented to the front of the listener, and the nonfluctuating speech-shaped noise (SSN) or fluctuating speech noise was either co-located with the target (speech at 0°, noise at 0°, S0N0) or spatially separated at ± 90°. The SRM was quantified as the difference between speech recognition thresholds (SRTs) in the co-located and spatially separated conditions. The self-reported spatial hearing abilities were also measured using validated subjective questionnaires.Results: Overall, the SRTs were lower (better) with SSN than with fluctuating speech noise. When the noise was presented to the non-CI ear (speech at 0°, noise at non-CI ear, S0Nnonci), speech-in-noise recognition was the greatest due to head shadow or better-ear listening effect, resulting in the SRMs of approximately 5~6 dB regardless of noise type. When the noise was given to the CI ear (speech at 0°, noise at CI ear, S0Nci), some individuals exhibited positive SRMs (3~8 dB), while others showed negative SRMs, leading to little SRMs overall. When the SSN was given, subjects with less SRMs (less spatial separation benefits on the objective test) reported greater subjective spatial hearing difficulties.Conclusion: The spatial hearing of unilateral CI users varied by the position of the sound source. Listeners' spatial hearing abilities, which are unpredictable from clinical routine tests, need to be assessed by either objective or subjective measures.

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