摘要
目的探讨言语谱噪声（speech spectrum-shaped noise,SSN）和多人谈话噪声（babble noise,BN）对低龄正常儿童普通话词汇相邻性测试（Mandarin lexical neighborhood test,MLNT）言语感知的影响。方法 34例3~6岁正常听力儿童分为SSN组（21例）和BN组（13例）,使用噪声下普通话词汇相邻性测试系统对两组儿童行声场下的言语测试,以听说复述方法获得不同信噪比下的言语识别率,比较两组两类噪声下的单音节易词表、难词表和双音节易词表、难词表的识别率-信噪比函数曲线（P-SNR曲线）和言语识别阈（SNR50）。结果 SSN组双音节易词表和难词表的SNR50阈值分别为-3dB、-0.5dB,单音节易词表和难词表的SNR50分别为-1dB、3.5dB;BN组双音节易词表和难词表的SNR50分别为-3dB、2dB,单音节易词表和难词表的SNR50分别为0.5dB、10dB。两组除双音节易词表SNR50相同外,其余各类词表BN组的SNR50均比SSN组高。词汇学因素对正常听力儿童噪声下的开放式言语识别的影响仍表现出易词识别率高于难词,双音节词识别率高于单音节词。结论对3~6岁正常听力儿童BN的掩蔽效应比SSN强,词汇学因素在噪声下仍然影响儿童的言语识别。
Objective To study normal hearing children＆#39;s speech perception in Speech Spectrum -Shaped Noise （SSN） and Babble Noise （BN） using the Mandarin lexical neighborhood test .Methods Thirty -four children with normal hearing were included in this study and randomly assigned to the SSN group and the BN group .Each child was given the 12 lists of Mandarin lexical neighborhood test ,word recognition scores were acquired at different SNRs .Results SNR50 of dissyllablic easy word lists ,dissyllablic hard word lists ,monosyllable easy word lists , monosyllable hard word lists in SSN were -3 dB ,-0 .5 dB ,-1 dB and 3 .5 dB ,respectively ;SNR50 of the four categories lists in BN were -3 dB ,2 dB ,0 .5 dB and 10 dB ,respectively .Lexical effects had a significant influence on spoken word recognition in noise .Especially ,word recognition scores of easy words were higher than those of hard words ,dissyllablic words were better than monosyllable words .Conclusion The masking effects of babble noise on spoken speech perception are stronger than speech spectrum -shaped noise for 3-6 year-old normal hearing chil‐dren .Lexical effects also affet children＆#39;s speech recognition in noise .
出处
《听力学及言语疾病杂志》
CAS
CSCD
北大核心
2015年第3期236-239,共4页
Journal of Audiology and Speech Pathology
基金
国家自然科学基金(81170916)
首都卫生发展科研专项基金(首发2011-1017-05)资助
关键词
儿童
噪声
言语感知
Children
Noise
Speech recognition
