noise reduction coefficient 中文意思是什麼
noise reduction coefficient
解釋
減噪系數- noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
- reduction : n 1 縮小，減少；降級，降位；（刑罰等的）輕減；減速；減價，折扣。2 （城市、國家等的）陷落，投降，...
- coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
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Fast algorithms of both discrete and orthonormal wavelet and wavelet packet coefficient are diagrammatized to be introduced. daubechies wavelet is applied to help to discuss the application and test on signal filtering and noise reduction with the principle and threshold implementation ; the basic principle to pickup the fault characteristics is introduced mainly about the relations between the maximum module and signal saltation point and how to characterize the saltation point with lipschitz exponent
展示了離散正交小波變換的mallat快速演算法和小波包系數分解的快速演算法；重點應用daubeches小波探討了小波變換在信號濾波去噪中的應用和實驗，闡述了其基本原理和通過閾值化處理實現濾波的具體方法；探討了用小波變換進行故障特徵提取的原理，說明了小波變換模極大值和信號突變點之間的關系以及怎樣用李氏指數來表徵突變點的性質。 -
The result shows that average absorption coefficient and noise reduction coefficient separately equal to 0. 58 and 0. 60, and fine property of sound absorption at middle - low frequency
結果表明材料的平均吸聲系數和降噪系數分別達0 . 58和0 . 60 ，且材料的中低頻吸聲性能優良。
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