低频随机振动和正弦振动对汉语清晰度的影响  

Effect of low frequencey random and sinusoidal vibrations on the intelligibility of Chinese syllables

作　　者：高慧[1] 周笃强[1] 黄端生[1] 李盈忠[1] 韩宜保[1] 

机构地区：[1]航天医学工程研究所,北京100094

出　　处：《应用声学》2001年第1期30-33,共4页Journal of Applied Acoustics

摘　　要：目的：探索随机振动和正弦振动因素下生成语音在听觉效果上的变化规律。方法：随机振动采 用频率范围２－２０Ｈｚ，加速度为０．３Ｇ、０．５Ｇ、０．７Ｇ（有效值，下同），正弦振动采用频率４、６、 ８、 １０、 １２Ｈｚ，加速度为 ０．３Ｇ、 ０．５Ｇ；在安静及信噪比分别为 ０ｄＢ和－６ｄＢ 三种状态下对随机 振动组、正弦振动组及对照组３个组的语音材料进行清晰度测试．结果：和对照组相比，随机振动 组，清晰度几乎没有变化，正弦振动组，０．３Ｇ时４Ｈｚ、０．５Ｇ时６Ｈｚ和８Ｈｚ作用下语音清晰度有 明显降低，检验结果非常显著．研究还发现，清晰度的降低随听音环境的信噪比的降低而变得严重； 结论：正弦振动对发音人发音的影响，会使通话效果交差，并且在听音环境恶劣时尤为突出．Objective: Changes of auditory effect on Chinese single syllables uttered by talker under random vibration or sinusoidal vibrations were investigated. Method: Random vibrations with frequency range of 2 to 20Hz were applied to sitting talker, and their accelerations being 0.3G, 0.5G and 0.7G(rms). Sinusoidal vibrations at 4, 6, 8, 10, 12Hz were also applied, their accelerations being 0.3G and 0.5G(rms). The intelligibility tests were made under three conditions(quiet, 0dB and -6dB S/N ratio). The utterances were recorded under random vibrations, sinusoidal vibrations, and the control condition. Results: as compared with the control group, there are almost no difference in the random vibration group, but the decrease of speech illteligibilities in the sinusoidal group is significant, when the frequency is 4Hz at 0.3G acceleration and when the frequencies are 6Hz or 8Hz at 0.5G acceleration. Results show that sinusoidal effects play greater roles as S/N decreases in the listenning environment. Conclusion: speech production will be changed affected by sinusoidal vibration, and the changes will deteriorate communication, especially in adverse listenning environment.

关 键 词：语音清晰度 噪声 汉语 低频随机振动 正弦振动 

分 类 号：TN912.3[电子电信—通信与信息系统]