符合普通话语境的宽动态范围压缩算法低频释放时间研究  

Study of low frequency release time in WDRC on hearing-impaired individual in mandarin language environment

作　　者：金凤 顾向阳 孙晋 陈友元[2] JIN Feng GU Xiangyang SUN Jin CHEN Youyuan(Department of Otorhinolaryngology, Shanghai Xuhui Central Hospital, Zhongshan Hospital Xuhui Hospital, Shanghai, 200031, China Shanghai Acoustics Laboratory, Chinese Academy of Sciences)

机构地区：[1]上海市徐汇区中心医院耳鼻咽喉科复旦大学附属中山医院徐汇医院,上海200031 [2]中国科学院声学研究所东海研究站

出　　处：《临床耳鼻咽喉头颈外科杂志》2017年第19期1478-1481,共4页Journal of Clinical Otorhinolaryngology Head And Neck Surgery

基　　金：上海市卫生和计划生育委员会青年科研项目(No:2013-154)

摘　　要：目的:探讨在普通话语境下WDRC(宽动态范围压缩算法)低频释放时间对助听器佩戴者言语识别率的影响。方法:将低频释放时间设置为50、100、200、400、800ms五个组,分别在3种掩蔽噪声下进行实验,共形成15组实验条件。以听力障碍者作为实验对象,以普通话言语仿真声作为测试音,通过仿真平台输出,在特定的噪声条件下测试言语识别率。结果:WDRC低频释放时间设置为400ms时,听障者言语识别率最佳;Babble Noise(多说话人噪声)对听力障碍者的噪声下言语识别率有显著影响。结论:在普通话语境下低频区间时间常数与噪声类型都会影响听力障碍者的普通话言语识别率。Objective：To investigate the influence of low frequency release time of WDRC（wide dynamic range compression）to speech recognition score （SRS） of deaf subjects with hearing aids in mandarin language environment. Method：Release time constants are set differently from the values of 50 ms, 100 ms, 200 ms, 400 ms and 800 ms in low frequency （LF） channel, with 3 kinds of shaped noise, combining a certain LF release time constant with a certain shaped noise forms 15 different groups of experimental conditions. The testing material is mandarin sentences which are the outputs of simulation in the 15 different release time combinations. Result： If the release time is set the value of 400 ms, the patients with hearing aids can get the best mandarin speech intelligibility; the type of babble noise have significant effects on mandarin SRS. Conclusion： Statistical analysis of test results shows that the release time in LF channel or the type of shaped noise trends to influence mandarin SRS.

关 键 词：宽动态范围压缩算法 普通话 释放时间 言语识别率 噪声 

分 类 号：R764[医药卫生—耳鼻咽喉科]