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

作　　者：李刚[1] 郑芸[1] 朱珍珍[1] 陶勇[1] 孟照莉[1] 胥科[1] 

机构地区：[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,四川610041

出　　处：《听力学及言语疾病杂志》2013年第5期477-479,共3页Journal of Audiology and Speech Pathology

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。Objective To explore the signal--to--noise ratio loss （SNR loss） of the people with normal pure --tone audiograms. Methods A group of 10 patients were recruited into the study, who complained they could not hear speech clearly in the real world environment but had normal pure--tone audiograms, immittance and word recognition score （WRS） results. The Mandarin hearing in noise test （M--HINT） was administered to them and the results were compared to the normal ranges published in the journal. Results All of them had SNR loss when noise （speech spectrum） came from front of them, but 9 patients had SNR loss when noise came from 90 degree left or 90 degree right of them. Conclusion The current study showed the patients had speech hearing loss in the noisy envi- ronment, regardless of whether they had normal audiograms, immittance and WRS results. So we should pay atten- tion to such patients and adopt some special tests （e g M--HINT）. It is better for us to communicate and counsel with them.

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 

分 类 号：R764.04[医药卫生—耳鼻咽喉科]