JIMI 发表于 20:51

有源降噪研究

论文编号:DZXX032  论文字数:10621,页数:28
摘要
 本论文主要通过三种不同的调控方式对中低频占主导地位的噪声进行频域上的调控(直接对原始噪声的某些频段进行调控;在原始噪声的基础上加入实际噪声),并通过成对比较法比较了不同调控方法和调控强度调控后噪声的主观烦恼变化情况;还有通过有源消声调控(直接对原始噪声加入反相器)。结果表明:所有调控方法在5种不同调控强度下主观烦恼排序基本一致,强度越强,烦恼度越高;在原始噪声中加入较低频率成分比加入较高频率成分更烦恼;加入自然背景声总体上比添加其他成分烦恼度更低。加入反相器后,明显消声。研究结果给主要通过改变噪声的频域特性来改善人们对噪声的主观感觉提供了研究基础。
关键词: 声调控,频域,主观烦恼
ABSTRACT
 This paper mainly regulated and controlled the frequency for dominant low-frequency noise through three kinds of different methods (regulating and controlling some of the original band directly; adding noise on the basis of the actual noise in the original noise), and adopted into Compared to the comparison of different control methods and control the intensity of the noise after changes in the subjective annoyance; Active Noise Control was also available method (directly by adding inverse noise of the original). The results showed that all-control methods were basically the same sort of subjective annoyance under five different intensity control, the more strength, the higher the degree of trouble. Adding noise in the low frequency components was more trouble than adding noise in the higher frequency components; on the whole adding the natural background sound was lower than adding other ingredients annoyance. By adding the inverter is obviously silence. The results primarily provided a research base to improve people's subjective sense through changing the noise frequency.
 
 Keywords: Voice control, frequency-domain, subjective annoyance
目录
摘要 I
ABSTRACT II
引言 1
第1章 有源降噪的研究情况 2
1.1 国内外研究状况 2
1.1.1 传统的噪声控制技术 2
1.1.2 噪声控制的新技术――有源控制 4
1.2 本课题及论文的研究内容 5
1.2.1 本课题的研究内容 5
1.2.2 本论文的研究内容 6
1.2.3 拟解决的的关键问题 6
第2章 有源降噪的调控方法 7
2.1 实验概述 7
2.2 实验软件 8
2.2.1 声望软件 8
2.2.2 cool edit pro2.0软件 9
2.2.3 origin软件 9
2.3 频域上的调控 10
2.3.1 实验过程 10
2.3.2 实验结果 14
2.4 自然声的叠加 16
2.4.1 实验过程 16
2.4.2 实验结果 16
2.5 反相器的应用 17
2.5.1 实验过程 17
2.5.2 小结 18
2.6 本章小结 18
第3章 结论 20
3.1 本论文的主要结论 20
3.2 需进一步研究的问题 20
3.3 展望 20
致谢 22
参考文献 23
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