Department of ENT, Section of Cochlear Implants, Karolinska University Hospital, Stockholm, Sweden.
Int J Audiol. 2012 Nov;51(11):817-32. doi: 10.3109/14992027.2012.705898. Epub 2012 Sep 3.
To compare bilateral and unilateral speech recognition in quiet and in multi-source noise, and horizontal sound localization of low and high frequency sounds in children with bilateral cochlear implants.
Bilateral performance was compared to performance of the implanted side with the best monaural speech recognition in quiet result. Parental reports were collected in a questionnaire. Results from the CI children were compared to binaural and monaural performance of normal-hearing peers.
Sixty-four children aged 5.1-11.9 years who were daily users of bilateral cochlear implants. Thirty normal-hearing children aged 4.8-9.0 years were recruited as controls.
Group data showed a statistically significant bilateral speech recognition and sound localization benefit, both behaviorally and in parental reports. The bilateral speech recognition benefit was smaller in quiet than in noise. The majority of subjects localized high and low frequency sounds significantly better than chance using bilateral implants, while localization accuracy was close to chance using unilateral implants. Binaural normal-hearing performance was better than bilateral performance in implanted children across tests, while bilaterally implanted children showed better localization than normal-hearing children under acute monaural conditions.
比较双侧和单侧植入的儿童在安静环境和多声源噪声环境下的言语识别能力，以及低频和高频声音的水平声定位能力。
将双侧植入的表现与安静环境下最佳单耳言语识别的单侧植入表现进行比较。通过问卷调查收集了家长的报告。将 CI 儿童的结果与正常听力儿童的双耳和单耳表现进行了比较。
64 名年龄在 5.1-11.9 岁的双侧人工耳蜗植入儿童，均为每日使用者。招募了 30 名年龄在 4.8-9.0 岁的正常听力儿童作为对照组。
组数据显示，在行为和家长报告中，双侧植入在言语识别和声音定位方面都有统计学上显著的优势。双侧植入在安静环境中的言语识别优势小于噪声环境。大多数受试者使用双侧植入物可以显著优于机会水平定位高低频声音，而使用单侧植入物时定位精度接近机会水平。在所有测试中，双耳正常听力表现优于植入儿童的双侧表现，而单侧植入的儿童在急性单耳条件下的定位能力优于正常听力儿童。
