WDRC释放时间对普通话言语理解度的影响研究  

Effect of release time in WDRC on mandarin speech intelligibility

作　　者：赵建平[1,2,1,3] 原猛[1,1,3] 冯海泓[1,1,3] 

机构地区：[1]中国科学院声学研究所东海研究站,上海200032 [2]中国科学院大学,北京100190 [3]上海市徐汇区中心医院听力与言语医学中心,上海200033

出　　处：《声学技术》2013年第3期217-221,共5页Technical Acoustics

基　　金：国家自然科学基金(11104316);上海市自然科学基金(11ZR1446000);中国科学院声学研究所所长择优创新基金(Y154221701);美国斯达克科学研究基金资助项目

摘　　要：宽动态范围压缩算法作为助听器非线性听力补偿的核心算法,其释放时间常数的设定可影响言语理解度。根据普通话的语音特点,将宽动态范围压缩算法按频率范围划分为低频区间(In digital hearing aids,wide dynamic range compression algorithm（WDRC） is commonly treated as the core algorithm to compensate loudness.Differences between release time constants in WDRC can affect speech intelligibility（SI）.Based on unique acoustic characteristics of Mandarin,WDRC algorithm are divided into two parts： low frequency（LF） channel and high frequency（HF） channel.Release time constants are taken as 5ms,100ms,and 2000ms in either LF channel or HF channel.Combining a certain LF release time constant with a certain HF one forms totally nine different release time combinations for hearing tests.Normal hearing objects go through the Mandarin SI tests with speech shaped noise.The testing material is Mandarin sentences which are the outputs of WDRC simulation in the 9 different release time combinations.Test results show that too short release time in LF channel or too long release time in HF channel trends to decrease Mandarin SI.The results can be a reference for WDRC parameter setting of Mandarin speaker.

关 键 词：宽动态范围压缩算法 释放时间 普通话 言语理解度 

分 类 号：R318.04[医药卫生—生物医学工程]