University Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern, Switzerland.
Otol Neurotol. 2011 Jan;32(1):1-6. doi: 10.1097/MAO.0b013e3182001cac.
To test whether in-the-canal (ITC) microphones have an impact on spatial discrimination and speech perception by taking advantage of auricular cues.
Experimental clinical study.
Audiologic laboratory in a tertiary referral center.
Seven bilateral adult cochlear implant (CI) users were selected from the institution's database.
The adaptive German Oldenburg sentence test and minimum audible angle measurements were performed binaurally with experimental ITC and behind-the-ear (BTE) microphones.
Spatial discrimination and speech perception scores assessed for each microphone position.
Spatial discrimination on the side of the head was superior using ITC compared with BTE microphone positions; the differences on the side of the first CI were statistically significant (mean minimum audible angle ± standard deviation, 28.4 ± 7.61 degrees versus 34.1 ± 14.4 degrees; p = 0.031). Speech perception scores with ITC versus BTE microphone positions also were improved, although the differences were not statistically significant.
ITC microphones could help to improve CI performance in the future.
利用耳内线索，测试耳道内（ITC）麦克风是否会影响空间辨别能力和言语感知能力。
实验性临床研究。
三级转诊中心的听力学实验室。
从机构数据库中选择了 7 名双侧成人人工耳蜗植入（CI）使用者。
使用实验性 ITC 和耳后（BTE）麦克风进行适应性德国奥尔登堡句子测试和最小可听角测量。
评估每种麦克风位置的空间辨别能力和言语感知得分。
与 BTE 麦克风位置相比，ITC 可改善头部一侧的空间辨别能力；在第一侧 CI 上的差异具有统计学意义（平均最小可听角±标准偏差，28.4±7.61 度与 34.1±14.4 度；p=0.031）。尽管差异无统计学意义，但与 BTE 麦克风位置相比，ITC 麦克风位置的言语感知得分也有所提高。
ITC 麦克风将来可能有助于改善 CI 的性能。
