听力图正常者的信噪比损失现象

Signal-to-noise Ratio Loss in the People with Normal Audiograms

李刚;郑芸;朱珍珍;陶勇;孟照莉;胥科;

1:四川大学华西医院耳鼻咽喉-头颈外科听力中心/听觉言语科学实验室

摘要

目的探讨听力图正常者是否存在信噪比损失(signal-to-noise ratio loss,SNR loss)现象。方法对2010年3月至2011年4月在四川大学华西医院听力及耳科门诊就诊,主诉为生活环境中聆听言语较困难,但纯音测听、声导抗和常规言语分辨率(word recognition score,WRS)测试结果正常的10名患者进行普通话版噪声下言语测听(Mandarin hearing in noise test,M-HINT),并将结果与现有文献报道的M-HINT正常值进行比较(以结果高于正常值判断为出现了SNR loss现象),评估患者是否存在SNR loss现象。结果在噪声环境中,当噪声来自患者正前方时,10名患者均出现了SNR loss现象;当噪声来自患者右侧或左侧时,9名患者出现了SNR loss现象。结论听力图正常者也可能存在SNR loss现象,对于主诉为生活环境中聆听言语困难者,即使纯音听力图正常也应考虑进行噪声下言语测听(如M-HINT测试),以评估患者是否存在SNR loss现象。

关键词

纯音听力图;言语接受阈;言语分辨率;普通话版噪声下言语测试;信噪比损失

基金项目(Foundation):

作者

李刚;郑芸;朱珍珍;陶勇;孟照莉;胥科;

参考文献

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纯音听力图言语接受阈言语分辨率普通话版噪声下言语测试信噪比损失

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李刚郑芸朱珍珍陶勇孟照莉胥科