汉语语言谱窄带噪声向上掩蔽特性的测量  

Measurement for Upward Masking of Narrowband Noise with Chinese Speech Spectrum

作　　者：尚楠[1] 章斯宇[1] 

机构地区：[1]中国传媒大学传播声学研究所,北京100024

出　　处：《电声技术》2014年第12期55-57,共3页Audio Engineering

基　　金：国家自然科学基金项目(11204278);高校博士点基金课题(20100018110001)

摘　　要：以汉语语音清晰度客观评价方法为背景,对汉语语言谱噪声相邻倍频带间的向上掩蔽特性进行了实验测量,与语言传输指数（STI）算法中采用的低频窄带噪声向上掩蔽模式的结果进行了对比分析。实验结果表明,当掩蔽声的声压级固定时,掩蔽斜率会根据掩蔽声频率的不同而有所不同但差别较小;当掩蔽声的频率一定时,随着声压级的提高,掩蔽斜率是渐增的趋势但并不明显,掩蔽斜率值基本保持在30～35 dB/octave之间,这与STI算法中使用掩蔽量级有较大的不同。An experimental measurement for upward masking of Chinese speech - liked noise between adjacent octave bands is described, and the result is compared with the upward masking pattern of low - frequency band noise used in speech transmission index. The experiment results show that when the sound pressure level of masker is fixed, the masking slope will be varied as the difference of masker~ frequency. When the frequency of masker is fixed, there is an increasing but not obvious trend for masking slope, the value keeps between 30 -35 riB/octave , which is quite different from the magnitude used in STI algorithm.

关 键 词：汉语语言谱 语谱噪声 掩蔽效应 向上掩蔽 掩蔽斜率 

分 类 号：TN912[电子电信—通信与信息系统]