駐極體傳聲器及其性能研究

應用物理學論文編號:WLX113  字數:8336,頁數:18

目  錄
中文摘要.........................................................1
英文摘要.........................................................2
目錄   ..........................................................3
   緒論...................................................4
   駐極體傳聲器的理論
 2.1 駐極體傳聲器的內部結構.......................................5
 2.2 駐極體傳聲器的工作原理.......................................5
 2.3 駐極體傳聲器膜的種類........................................5
 2.4 駐極體傳聲器的基本種類.......................................5
 2.5 駐極體傳聲器的靈敏度定義.....................................6
 2.6 靈敏度測試電路..............................................6
 2.7駐極介紹...................................................6
 2.8場效應作用.................................................7
 2.9 影響靈敏度的因素 ...........................................7
第三章     實驗和分析
 3.1 全指向性駐極體的靈敏度和頻響曲線 ...............................8
 3.1.1表面電位對靈敏度的影響....................................8
 3.1.2 塑環厚度對靈敏度的影響...................................9
 3.1.3不同測試條件對應的靈敏度..................................9
 3.1.4背極板小孔數量對頻響曲線的影響............................10
 3.1.5振膜厚度對頻響曲線的影響.................................11
 3.2 單指向性駐極體傳聲器........................................11
     3.2.1 單指向性駐極體性傳聲器理論...............................11
     3.2.2單指向性駐極體傳聲器的原理...............................11
     3.2.3 單指向性駐極體傳聲器的性能研究-...........................12
第四章     結論...................................................16
致謝............................................................17
參考文獻.........................................................18

摘   要
 隨著通信技術和計算機技術的不斷發展與壯大，相應圍繞其產生的電子產業也必將有巨大的發展空間，而且相應的技術要求和性能指標也越來越高。駐極體傳聲器作為通信技術和計算機技術的附屬電子產品，由于其優越的性能得到了許多開發商的重視和用戶的青睞。
 本論文主要介紹駐極體的原理和結構，以及重要元件的功能，由于用戶對駐極體傳聲器的性能要求與日俱增，本文還進一步探索研究了影響駐極體傳聲器性能的一些因素，通過實驗測出了一些相應的數據，如不同表面電位對應的靈敏度，不同塑環對應的靈敏度，不同測試條件對應的靈敏度，還有定性地分析了背極板小孔數量和振膜厚度對駐極體傳聲器靈敏度的影響.針對市場的要求，本文還介紹了單指向傳聲器，通過改進其結構，并研究相應性能，做出定性的分析。
關鍵字: 駐極體  靈敏度  單指向  頻響曲線

Abstract
 With the development of communication technology and computer technology ，corresponding around its electronics industry will also have tremendous room to grow, and the corresponding technical requirements and performance indicators are getting higher and higher, electret microphone as the subsidiary electronic products of communication technology and computer technology because of their superior performance,  making a wide range of developers and users love it.
 This paper introduces electret principle and structure, as well as the function of important components, as the users’ requirements of the electret microphone performance in the growing, the paper also further explore a number of factors that impact the performance of electret microphone, Through experiments measured a number of corresponding data. Such as the different surface potential corresponding sensitivity, the difference from of plastic ring corresponding sensitivity, the different voltage test corresponding sensitivity , this paper also qualitative analysis the impact of electret microphone sensitivity by the number of holes on the back plate and the thickness of the diaphragm. To meat the market demands, it also introduced the undirectional microphones after improving its structure and study its performance and make a qualitative analysis.
Keywords:  electret  sensitivity  undirectional   Frequency response curve