Speech emotion recognition based on statistical pitch model

A modified Parzen-window method, which keep high resolution in low frequencies and keep smoothness in high frequencies, is proposed to obtain statistical model. Then, a gender classification method utilizing the statistical model is proposed, which have a 98% accuracy of gender classification while long sentence is dealt with. By separation the male voice and female voice, the mean and standard deviation of speech training samples with different emotion are used to create the corresponding emotion models. Then the Bhattacharyya distance between the test sample and statistical models of pitch, are utilized for emotion recognition in speech. The normalization of pitch for the male voice and female voice are also considered, in order to illustrate them into a uniform space. Finally, the speech emotion recognition experiment based on K Nearest Neighbor shows that, the correct rate of 81% is achieved, where it is only 73.85% if the traditional parameters are utilized.     

RC型音调控制电路在高传真扩音机中的应用

在高传真扩音机的前置级中，加入音调控制电路，通过理论分析，按实际要求突出或减弱高音区或低音区，以改善音质，达到满足听觉习惯不同的使用者的需要。     

乐音演示实验的几点改进

乐音演示实验的几点改进杨军（江苏省淮阴师范学校２２３３００）物理教学中“乐音”这一内容，就其本身来说是能够教得既生动形象又引人入胜的．但是由于教材与实验条件等因素的限制，往往使教学效果不那么理想．为此，笔者对乐音演示实验作了几点改进，让学生在观察感受...     

核心素养视域下“探究音调的影响因素”教学研究

根据中国古代传统乐器编钟的形制和发声原理,自制一种音调探究仪,并运用DIS实验进行科学探究的教学活动设计,发挥信息技术的实验数据采集和可视化功能,让学生获得具体定量的探究活动体验,激发学生探究兴趣,研究音调的影响因素,培养科学思维和实验探究能力,同时,让学生认识编钟的声学机理和中国古代声乐文化.     

澄清对多普勒效应的几点误解

详细讨论了波源和观察者在垂直二者连线方向上运动时是否会产生多普勒效应,波源和观察者之间的相对位置是否会影响多普勒效应,火车经过观察者时汽笛的音调是否是先越来越高后越来越低等三个容易对多普勒效应产生误解的地方,并给予澄清.特别地,推导出了波源和观察者沿任意方向运动时的精确的多普勒效应公式,证明了多普勒效应与波源和观察者之间的相对位置无关.     

用竹管做振动的空气柱长短与声音音调变化关系的实验

1问题的提出 初中学生学过音乐的三要素后,常见到这样一道题目:由图1所示,在试管里装入深度不同的水,当向试管口由A向D轻轻吹气时,发出的声音,音调越来越＿＿,这声音是靠＿＿振动产生的.     

Effects of pulse chirp on supercontinuum produced in dispersion decreasing fibre

The supercontinuum (SC) source plays a key role in wavelength division multiplexing over the optical time division multiplexing (WDM/OTDM) transmission system. The SC produced in dispersion decreasing fibre (DDF) is wider and flatter than that produced in dispersion shifted fibre (DSF). In this paper, a SC producing process in DDF is numerically simulated, the effects of pump pulse chirp on the SC width and flatness are initially studied and the corresponding theoretical explanations are given. Particularly, we have analysed and compared the evolutions of the SC along DDF pumped by different chirp pulses. Several valuable conclusions are obtained.     

疾驶而过的车喇叭的音调怎样变化

在“多普勒效应”一节新课教学时，笔者与学生到公路边多次反复体验疾驶而过的汽车喇叭的音调变化．比较一致的感觉是，仔细辨别能感觉到汽车驶来与离去时喇叭的音调有变化，但喇叭响度和行驶噪声的远近变化对喇叭音调变化的判断有着严重干扰，倒感觉似乎驶来的时候音调越来越高，离开的时候音调越来越低了．这样的直觉是否正确？我们听到的喇叭的音调究竟是怎样变化的？     

一道物理实验设计选题的两种实验验证

对一道运用常规思维无法解决的物理实验设计选题,从转动惯量和发声音调两个视角给出了实验方案及实验验证.     

a系语气词特殊发音基频的情感表现*

语气词在日常对话中频繁使用,能表达特定的情感。a系语气词在生活广泛使用,口语中的某些语气词的特殊音调并不是普通话四个标准声调。该文从发音的基频角度出发,认为特殊音调能适用于一类情感的表达,提取特殊音调的基频数据,发现其在基频上的线性变化特征以及发音的规律。从基频上合成特殊音调语气词并应用到句子的语气词中,通过情感识别对比实验和情绪反馈对比实验表明,含有该种特殊音调语气词的情感语句使听音人产生较强烈的正向情绪,感到更加愉悦。