有源降噪研究

電子信息工程論文編號:DZXX032  論文字?jǐn)?shù):10621,頁數(shù):28

目錄
摘要 I
ABSTRACT II
引言 1
第1章 有源降噪的研究情況 2
1.1 國內(nèi)外研究狀況 2
1.1.1 傳統(tǒng)的噪聲控制技術(shù) 2
1.1.2 噪聲控制的新技術(shù)——有源控制 4
1.2 本課題及論文的研究內(nèi)容 5
1.2.1 本課題的研究內(nèi)容 5
1.2.2 本論文的研究內(nèi)容 6
1.2.3 擬解決的的關(guān)鍵問題 6
第2章 有源降噪的調(diào)控方法 7
2.1 實(shí)驗(yàn)概述 7
2.2 實(shí)驗(yàn)軟件 8
2.2.1 聲望軟件 8
2.2.2 cool edit pro2.0軟件 9
2.2.3 origin軟件 9
2.3 頻域上的調(diào)控 10
2.3.1 實(shí)驗(yàn)過程 10
2.3.2 實(shí)驗(yàn)結(jié)果 14
2.4 自然聲的疊加 16
2.4.1 實(shí)驗(yàn)過程 16
2.4.2 實(shí)驗(yàn)結(jié)果 16
2.5 反相器的應(yīng)用 17
2.5.1 實(shí)驗(yàn)過程 17
2.5.2 小結(jié) 18
2.6 本章小結(jié) 18
第3章 結(jié)論 20
3.1 本論文的主要結(jié)論 20
3.2 需進(jìn)一步研究的問題 20
3.3 展望 20
致謝 22
參考文獻(xiàn) 23

摘要

 本論文主要通過三種不同的調(diào)控方式對中低頻占主導(dǎo)地位的噪聲進(jìn)行頻域上的調(diào)控（直接對原始噪聲的某些頻段進(jìn)行調(diào)控;在原始噪聲的基礎(chǔ)上加入實(shí)際噪聲），并通過成對比較法比較了不同調(diào)控方法和調(diào)控強(qiáng)度調(diào)控后噪聲的主觀煩惱變化情況；還有通過有源消聲調(diào)控（直接對原始噪聲加入反相器）。結(jié)果表明：所有調(diào)控方法在5種不同調(diào)控強(qiáng)度下主觀煩惱排序基本一致，強(qiáng)度越強(qiáng)，煩惱度越高；在原始噪聲中加入較低頻率成分比加入較高頻率成分更煩惱；加入自然背景聲總體上比添加其他成分煩惱度更低。加入反相器后，明顯消聲。研究結(jié)果給主要通過改變噪聲的頻域特性來改善人們對噪聲的主觀感覺提供了研究基礎(chǔ)。

關(guān)鍵詞： 聲調(diào)控，頻域，主觀煩惱

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