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題 名 | 數位信號處理器於主動式噪音控制之設計 |
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作 者 | 王志銘; 張順雄; 林蔚文; | 書刊名 | 中華民國音響學刊 |
卷 期 | 3:1 1995.05[民84.05] |
頁 次 | 頁59-71 |
分類號 | 448.5 |
關鍵詞 | 主動式噪音控制; 適應性濾波器; 數位信號處理器; Active noise control; Adaptive filter; Digital signal processor; |
語 文 | 中文(Chinese) |
中文摘要 | 為了對抗環境中的噪音,研究人員已化被動為主動,從已往消極的防備噪音,開 發各種材質的吸音設備或變更環境的幾何空間設計,到現在的主動噪音控制,採取以夷制 夷的策略,利用音波重疊產生的非建設性干擾來消除原來的噪音信號。當然這也要歸功於 近幾年數位信號處理器快速的發展,使得各種複雜的演算法得以及時(real time)執行,數 位信號處理器在整個系統中扮演著主導的地位,每個由麥克風偵測到的噪音取樣信號都必 須很快速的經過數位信號處理器的運算後再輸出,本文採用德州儀器公司的TMS320C30數位 信號處理器,其具有的33.3MIPS快速演算能力,適足以擔當此重要角色。 |
英文摘要 | In recent year, the measures to fight against environmental noise have evolved from the more traditional passive methods, such as the use of sound- absorbing materials and the geometric design of structures, into the current active noise control (ANC). This state-of-the-art technique reduces noise by superposition sound waves in a way that produces destructive interference. However, the success of this technique is largely hinged on the recent advancement of the digital signal processors (DSP). A DSP plays the center role in a system for ANC since it is capable of executing many complicated algorithms in real time. Every noise sample picked up by the microphone is then output after being processed rapidly by the DSP. This paper adopts the TMS320C30 DSP made from TEXAS INSTRUMENT Co. This chip has the computing power of 33.3 MIPS so that it is suitable for this project. |
本系統中英文摘要資訊取自各篇刊載內容。