128例儿童真耳-耦合腔差值临床分析  

Analysis of RECDs obtained from 128 children

作　　者：邹建华[1] 邱素梅[1] 钟志茹[1] 蓝小兵[1] 

机构地区：[1]广东省残疾人康复中心,广州510055

出　　处：《中国听力语言康复科学杂志》2008年第4期27-29,共3页Chinese Scientific Journal of Hearing and Speech Rehabilitation

基　　金：广东省科技厅科研课题(项目编号:53045)

摘　　要：目的探索各年龄段听障儿童真耳-耦合腔差值的特点以及耳道容积、声阻抗、耳模的变化等因素对真耳-耦合腔差值的影响。方法选取128例6个月～7岁配戴助听器的听障儿童,采用美国Fonix6500-cx真耳分析仪,用探管测试方法,使用扫频纯音分别测试鼓膜处的声压级和耦合腔中的声压级,两者之间的差即是真耳-耦合腔差值。结果①RECD值随小儿年龄增长而变小,年龄跨度≤3岁无统计学差异(P>0.05);年龄跨度≥4岁有统计学差异(P<0.05);年龄跨度≥5岁有极显著差异(P<0.01)。②外耳道声压级比分析仪中2cc耦合腔声压级高约3～19dB。③RECD值受探管插入深度、位置及耳模声管等因素的影响。结论RECD值是儿童验配助听器中重要的个体化指标,在2cc耦合腔中调试助听器参数时应重视加入个人的RECD值,才能准确获得助听器实际所需要的增益量及限制输出量。Objective To understand the characteristics of RECDs obtained from Chinese children at different ages and to determine the possible effects of changes in ear canal volume, acoustic impedance, earmolds and other factors on RECD. Methods 128 hearing-impaired children from 6 months to 7 years old, fitted with hearing aids, received real ear measurements with probe microphones with Fonix 6500-cx. Results RECDs changed as a function of ages, decreasing with age increase. No significant differences were found bet...

关 键 词：真耳-耦合腔差值 助听器验配 

分 类 号：R764.5[医药卫生—耳鼻咽喉科]