Vanderbilt University Medical Center, Department of Hearing and Speech Sciences, Nashville, TN.
Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL.
Otol Neurotol. 2021 Dec 1;42(10S):S19-S25. doi: 10.1097/MAO.0000000000003375.
The primary purpose of this study was to examine the effect of acoustic bandwidth on bimodal benefit for speech understanding in pediatric cochlear implant (CI) recipients.
Ten children (6-13 years) with CIs utilizing a bimodal hearing configuration participated in this study. Speech understanding was assessed via recorded Pediatric AzBio sentences presented in a 10-talker babble. The CI stimulus was always unprocessed and the low-pass filtered acoustic stimuli were delivered to the non-CI ear with the following cutoff frequencies: 250, 500, 750, 1000, and 1500 Hz.
Tertiary referral center.
Sentence recognition in noise for the acoustic-alone, CI-alone, and bimodal listening conditions.
The primary findings were: (1) children gained significant bimodal benefit with 250 Hz, and (2) children demonstrated no statistically significant additional bimodal benefit with increasing acoustic bandwidth.
Acoustic bandwidth effects for pediatric CI recipients were significantly different than those documented in the literature for adult CI recipients. Specifically, this group of pediatric CI recipients demonstrated no increases in bimodal benefit with increases in acoustic bandwidth, primarily consistent with a segregation theory of bimodal integration.
本研究的主要目的是研究听觉带宽对儿童人工耳蜗（CI）使用者双模式语音理解增益的影响。
本研究纳入了 10 名（6-13 岁）使用双模式听力配置的 CI 使用者。通过记录的儿科 AzBio 句子，在 10 位说话者背景噪声下评估语音理解能力。CI 刺激始终为未处理的，低通滤波的声刺激传递到非 CI 耳，截止频率分别为：250、500、750、1000 和 1500Hz。
三级转诊中心。
在声学单听、CI 单听和双模式听条件下的句子识别噪声。
主要发现为：（1）儿童在 250Hz 时获得显著的双模式增益；（2）儿童在增加听觉带宽时，没有表现出统计学上显著的额外双模式增益。
儿童 CI 使用者的听觉带宽效应与成人 CI 使用者文献中记录的效应明显不同。具体而言，这组儿童 CI 使用者在增加听觉带宽时，双模式增益没有增加，主要与双模式整合的分离理论一致。
