Beijing Tongren Hospital, Beijing Institute of Otolaryngology, Capital Medical University, Beijing, China.
Key Laboratory of Otolaryngology Head and Neck Surgery, Capital Medical University, Ministry of Education, Beijing, China.
Int J Audiol. 2020 Jul;59(7):548-555. doi: 10.1080/14992027.2020.1719437. Epub 2020 Apr 17.
To assess the recognition of lexical tones in Mandarin-speaking bimodal cochlear implant (CI) subjects. Lexical tone recognition in quiet and noise (SNR= +5 dB) was measured with electric stimulation (CI alone) or bimodal stimulation (CI + hearing aid (HA)). The recognition and confusion rates of the four tones (T1, T2, T3 and T4) were analysed. Spearman correlation analysis was performed to examine the relationship between hearing levels in the contralateral ear and bimodal benefits. Twenty native Mandarin-speaking bimodal CI users, with ages ranging from 16-49 years. Relative to the CI alone, mean tone recognition with the CI + HA improved significantly from 84.1-92.1% correct in quiet (+8 points) and from 57.9-73.1% correct in noise (+15.2 points). Tone confusions between T2 and T3 were the most prominent in all test conditions, and T4 tended to be labelled as T3 in noise. There was no significant correlation between the bimodal benefits for tone recognition and the unaided or HA-aided pure-tone thresholds at 0.25 kHz. Listeners with CI + HA exhibited significantly better tone recognition than with CI alone. The bimodal advantage for tone recognition was greater in noise than in quiet, perhaps due to a ceiling effect in quiet.
评估使用中文普通话的双耳双模人工耳蜗（CI）使用者对词汇声调的识别能力。使用电刺激（仅 CI）或双模刺激（CI+助听器（HA））测量安静和噪声（SNR=+5dB）中的词汇声调识别。分析了四个声调（T1、T2、T3 和 T4）的识别率和混淆率。进行 Spearman 相关分析以检验对侧耳听力水平与双模获益之间的关系。20 名母语为普通话的双耳双模 CI 用户，年龄在 16-49 岁之间。与仅 CI 相比，CI+HA 的平均声调识别在安静时从 84.1-92.1%正确（提高 8 个百分点），在噪声中从 57.9-73.1%正确（提高 15.2 个百分点）显著提高。在所有测试条件下，T2 和 T3 之间的声调混淆最为突出，T4 在噪声中往往被标记为 T3。声调识别的双模获益与 0.25kHz 时未助听或助听听阈之间无显著相关性。使用 CI+HA 的听众在声调识别方面的表现明显优于仅使用 CI。与安静时相比，噪声中声调识别的双模优势更大，这可能是由于安静时的上限效应。
