白噪声掩蔽效应的临床应用

Clinical Application of White-noise Masking Effect(Langenbeck's method)

目的 研究白噪声掩蔽效应试验（Ｌａｎｇｅｎｂｅｃｋ 法） 检测蜗性聋重振现象的敏感性。方法 用德国产ＢＯＳＣＨ 听力计对３０ 例（４４ 耳） 感音神经性听力损失患者作纯音测试和阈上测听（ 包括Ｌａｎｇｅｎｂｅｃｋ ，ＳＩＳＩ和ＡＢＬＢ 试验） ，比较三种试验相对于三种听力曲线及１ ，２ 和４ ｋＨｚ 三频率的阳性结果。结果 纯音听阈曲线：谷形１５ 耳，高频斜坡形下降１６ 耳，高频陡峻形下降１３ 耳。ＳＩＳＩ 得分６０ ％ ～１００ ％ ３６ 耳（８１－８ ％ ） ；ＡＢＬＢ 阳性３５ 耳（７９－５ ％ ） ，两者互有重叠覆盖，未发现两者均阴性者；Ｌａｎｇｅｎｂｅｃｋ 法掩蔽无效３４耳（７７－２ ％ ，其中单纯４ ｋＨｚ 掩蔽无效１５ 耳，４ ｋＨｚ 合并２ ｋＨｚ 掩蔽无效１３ 耳，４ ｋＨｚ 合并１ ｋＨｚ 掩蔽无效６耳） ，与ＳＩＳＩ和ＡＢＬＢ 阳性率８１－８ ％ 和７９－５ ％ 相比，统计学上无显著差异。结论 白噪声掩蔽效应测试也是一种可靠的纯音阈上测试。

Objective To study the sensitivity of application of white-noise masking effect.Methods Pure tone audiometry,SISI,ABLB and white-noise masking effect(Langenbeck's methods) audiometries were performed in 30 patients (44 ears) with sensorineural hearing loss with BOSCH audiometer made in Germany.Results The results were as follows:positive score(60%～100%) of SISI was found in 36 ears(81 8%) and positive ABLB in 35 ears (79 5%),no one was negative in both tests.There was overlapping in the results of both tests;White-noise masking effect didn't affect the threshold of pure tone in 34 ears(77.2%).The difference between the results of white-noise masking effect audiometry and SISI or ABLB audiometry was not significant( P >0.05).Conclusion The present study suggested that white-noise masking audiometry is an effective audiometry to find recruitment of cochlear deafness.