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研究生:林太山
研究生(外文):Tain-shan Lin
論文名稱:減音裝置之吸隔音係數現場量測
論文名稱(外文):In-situ measurements of sound absorption and insulation coefficients of noise abatement devices
指導教授:許榮均許榮均引用關係
指導教授(外文):Rong-juin Shyu
學位類別:碩士
校院名稱:國立臺灣海洋大學
系所名稱:系統工程暨造船學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:78
中文關鍵詞:音源訊號MLS平均取樣次數訊噪比時間權窗長度吸隔音係數
外文關鍵詞:CEN/TS 1793-5Adrienne
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本研究依據CEN/TS 1793-5量測規範,探討交通系統減音裝置之現場吸隔音係數量測準確度,透過現場量測結果進行相關參數研析,其中包含音源訊號MLS、平均取樣次數、訊噪比與Adrienne時間權窗長度調整,由吸隔音係數量測結果,確認各項參數調整對於準確度之影響,例如提高訊噪比與增加訊號平均次數,可有效增加量測準確度,再藉由量測規範原則適當調整Adrienne時間權窗長度,以排除繞射音與反射音之干擾,即可提高一致性且量測結果與實驗室量測數據趨近。
此量測方法可運用於分析減音裝置的聲學特性,進行不同減音裝置現場吸隔音係數量測分析比較,量測結果可瞭解減音裝置的減音裝置與維護狀況及期齡影響,未來可作為機關進行減音裝置完工後現場驗收、保固或汰換時機之參考依據。

According to the measurement specification of CEN/TS 1793-5,we investigated the accuracy of sound insulation and absorption coefficient in measuring the transport system noise reduction devices and we used to analysis the correlation coefficients from the measured results which contains the measurement signal types, average sampling times, signal to noise ratio, Adrienne time windows adjustment…etc. In the measurement experiment we confirmed that the parameter adjustment for accuracy. For example, we can increase the measurement accuracy effectively by improving the signal to noise ratio and the average number, and after we excluding the interference of the diffracted and reflected sound with adjusting to Adrienne time windows. Finally we could improve the reproducibility and approach the measurement results to measurement data on laboratory.
Further more, it can analyze the acoustic characteristics of sound reduction devices by exploring this measurement technology, and it also could know the construction quality, maintenance of the condition, and useful life by measuring and analyzing the sound insulation and absorption coefficients on different noise reduction devices. In the future, that will be a reference for checking, maintain replacing the noise reduction devices to relevant departments and units

摘 要 IV
Abstract IV
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 2
1.3 文獻回顧 2
1.4 研究架構及流程 3
第二章 減音裝置吸隔音係數現場量測理論 5
2.1 聲音傳遞 5
2.1.1 聲波的反射和折射 5
2.1.2 聲波的散射及繞射 7
2.1.3 聲速 8
2.2 材料聲學特性 9
2.2.1 隔音特性 9
2.2.2 吸音特性 10
2.3 現場量測相關技術理論 10
2.3.1 音源訊號(MLS) 10
2.3.2 互相關函數(Cross-correlation function) 13
2.3.3 脈衝響應函數(Impulse-response function) 13
2.3.4 減法技術(Subtraction Method) 14
2.3.5 Adrienne權窗 16
2.3.6 現場隔音指標(Sound insulation index,以下簡稱S.I)計算 17
2.3.7 現場反射係數(Reflection index,以下簡稱RI)計算 18
2.3.8 隔音指標評定計算DLSI 18
2.3.9 訊噪比及準確度 19
第三章 現場量測參數研析 21
3.1 減音裝置現場量測系統 21
3.1.1 量測系統簡介 21
3.1.2 現場量測佈置 23
3.1.3 量測程序與分析流程 27
3.1.4 量測系統校正 31
3.1.5 環境氣候與量測頻率要求 32
3.1.6 量測系統參數設定 33
3.2 量測系統驗證與參數影響研析 33
3.2.1 量測系統驗證 34
3.2.2 脈衝響應訊號 35
3.2.3 量測支架振動影響 36
3.2.4 量測訊號種類研析 38
3.2.5 平均採樣次數 38
3.2.6 訊噪比 41
3.2.7 調整Adrienne時間權窗 44
3.3 小結 48
第四章 減音裝置現場實驗結果比較研析 49
4.1 現場量測 49
4.1.1 影響量測之參數設定 49
4.1.2 量測對象說明 50
4.2 現場吸音係數量測 53
4.2.1 量測結果說明 53
4.2.2 量測結果研析 55
4.3 現場隔音係數量測 55
4.3.1 量測結果說明 55
4.3.2 量測結果研析 56
4.4 小結 62
第五章 結論與未來展望 63
5.1 結論 63
5.2 未來展望 64
參考文獻 66


[1] EN 1793-5: Road traffic noise reducing devices-Test method for determining the acoustic performance-Part5: In situ values of sound reflection and airborne sound insulation, 2002.
[2] Davies,V. D. T, ”Generation and properties of maximum-length sequences”, Control, June1966, pp. 302-304,1996。
[3] MacWilliams, F. J. and Sloane,N. J. A., ”Pseudo-random sequences and arrays”,Proc. of the IEEE, vol. 64, no. 12, pp. 1715-1730, 1976.
[4] Rife, D. D. and Vanderkooy,J. (1989), ”Transfer function measurement with maximum-length sequences”, J. Audio Eng. Soc., vol. 37, no. 6,pp. 419-444.
[5] Mommertz E., “Angle-Dependent In-situ Measurements of Reflection Coefficients Using a Subtraction Technique”, Applied Acoustics ,Volume 46 , Issue 3 , Page 251-263 , 1995.
[6] In the Adrienne project (1995-1997), several European partners of CEN/TC 226/WG6 have investigated methods for the in-situ measurement of sound absorption and insulation. The temporal window, designed for that purpose, is named after this project.
[7] E.B. Viveiros , B.M. Gibbs , S.N.Y. Gerges, “Measurement of sound insulation of acoustic louvers by an impulse method”, Applied Acoustics , Volume 63 , Page 1301-1313, 2002.
[8] 陳金文編著,建築音響學及其應用,科技圖書股份有限公司,2003。
[9] 林文清,“道路鋪面吸音特性量測及降噪預估之研究”,國立台灣海洋大學系統工程暨造船研究所碩士論文,2004。
[10] ISO 13472-1 Acoustics-Measurement of sound absorption properties of road surfaces in situ-Part1: Extended surface method.
[11] Francesco Asdrubali, “Experimental evaluation of the diffracting performances of multipurpose noise barrier profiles”, ForumAcousticum, 2005.
[12] Greg Watts, Phil Morgan, “Measurement of airborne sound insulation of timber noise barriers : Comparison of in situ method CEN/TS 1793-5 with laboratory method EN 1793-2”, Applied Acoustics , 2006.
[13] Massimo Garai, Paolo Guidorzib,“Case history: in situ verification of the intrinsic characteristics of the acoustic barriers installed along a new high speed railway line”, INTER-NOISE 2006
[14] Marco Conter, Manfred Haider, Johanna Bohrn, Alfred Lechner, “Investigation of the long-time performance of a noise barrier and statistical stability of the reflection index with the adeienne method”, 3rd Congress of the Alps Adria Acoustics Association, 2007.
[15] M. Conter, M. Haider, “Austrian investigation on the influence of sound leakage in noise reducing devices”, Euro noise , 2008.
[16] Jambrosic, Kristian, “In-situ measurement of the absorption coefficient”, 2009。
[17] M. Conter, M. Haider, “Austrian investigation on the influence of sound leakage in noise reducing devices”, euro noise , 2008.
[18] 陳炳全, “現場量測隔音指標與吸音係數之分析”,國立台灣海洋大學系統工程暨造船研究所碩士論文,2011。

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