改良儿童声源定位能力评测系统的评价

Evaluation of the modified test system for children sound localization

目的 评估改良儿童声源定位能力评测系统对儿童声源定位能力测试的可行性.方法 利用改良儿童声源定位能力评测系统测试4~6岁听力正常儿童（15名,男童6名,女童9名）正前方水平方位角度辨别阈（minimum audible angle,MAA）及角度偏差值,并与改良前方法测得数据（10名,男童5名,女童5名）比较,验证改良儿童声源定位能力评测系统的准确性及稳定性.以SPSS 17.0软件对数据进行统计学分析（t检验）.结果 改良儿童声源定位能力评测系统与改良前测试方法的准确性比较：4~6岁正常听力儿童改良后评测系统测试正前方MAA（3.23±1.00）°,角度偏差（13.68±5.18）°;改良前方法测试正前方MAA（3.17±0.59）°,角度偏差（13.96±4.56）°;组间差异均无统计学意义（t至分别为0.16、-0.14,P值均＞0.05）.改良儿童声源定位能力评测系统与改良前测试方法耗时比较：改良后测试耗时MAA为（14.67±1.95）min,角度偏差为（6.67±1.35）min;改良前测试耗时MAA为（36.30±6.81）min,角度偏差为（21.00±3.50）min,组间差异均有统计学意义（t值分别为-9.78 、-12.37,P值均＜0.05）.结论 改良儿童声源定位能力评测系统测试流程简单,耗时短,且结果稳定可信.

Objective To evaluate the feasibility of modified test system for sound localization （SL） in children.Methods Modified system （6 male, 9 female） and traditional method （5 male, 5 female） were used for evaluation of minimum audible angle（MAA） and root-mean-square error（RMS） error of 4 to 6 years old children, and the results were compared to verify the accuracy and effectiveness of the modified test system for children sound localization.SPSS 17.0 software was used to analyze the data（t test）.Results （1） Comparison of veracity of modified system and traditional test： when tested at the positive front position using modified system, MAA and RMS error were（3.23±1.00）° and （13.68±5.18）° respectively.When using traditional method,MAA and RMS error were（3.17±0.59）°and （13.96±4.56）° respectively.No statistical differences were found between two groups（t value was 0.16,-0.14, both P〉0.05）.（2） Comparison of time used were as followed： when using modified system, it was （14.67±1.95） min for MAA, and （6.67±1.35） min for RMS error.When using traditional method, it was （36.30±6.81） min for MAA, and （21.00±3.50） min for RMS error.Time used were significant shorter in modified system than in traditional method （t value was-9.78 ,-12.37, both P〈0.05）.Conclusion Modified test system for children sound localization is useful and reliable in children′s horizontal SL test.The time used of modified test system is shorter than that of traditional test system.