多功能音頻信號(hào)發(fā)生器

電子信息工程論文編號(hào):DZXX086  論文字?jǐn)?shù):19614,頁數(shù):52
 
 目錄
摘要 I
ABSTRACT II
第1章 緒論 1
1.1 課題背景及重要意義 1
1.1.1課題的背景 1
1.1.2課題的意義 2
1.2 課題設(shè)計(jì)的目的及目標(biāo) 2
1.2.1課題的目的 2
1.2.2 課題的目標(biāo) 2
第2章 設(shè)計(jì)方案論證 4
2.1 多功能音頻信號(hào)發(fā)生器的實(shí)現(xiàn)方案一 4
2.1.1 設(shè)計(jì)性能 4
2.1.2 設(shè)計(jì)實(shí)現(xiàn) 4
2.2 多功能音頻信號(hào)發(fā)生器的實(shí)現(xiàn)方案二 5
2.2.1 設(shè)計(jì)性能 5
2.2.2 設(shè)計(jì)實(shí)現(xiàn) 5
2.3 兩種方案的對(duì)比 6
第3章多功能音頻信號(hào)發(fā)生器的框架設(shè)計(jì) 7
3.1數(shù)據(jù)流信號(hào) 8
3.1.1總體策劃 8
3.1.2遇到的問題 10
3.2音頻設(shè)計(jì) 10
3.2.1總體策劃 10
3.2.2遇到的問題 10
3.3軟件界面 11
3.3.1總體策劃 11
3.3.2遇到的問題 12
第4章 多功能音頻信號(hào)發(fā)聲器的詳細(xì)設(shè)計(jì) 13
4.1各種類型信號(hào)的實(shí)現(xiàn) 13
4.1.1 采樣頻率的確定 13
4.1.2數(shù)據(jù)流生成函數(shù)的設(shè)計(jì) 13
4.1.3 正弦波 15
4.1.4白噪聲 17
4.1.5掃頻正弦波 18
4.1.6幅度掃描正弦波 19
4.1.7粉紅噪聲 20
4.1.8猝發(fā)音信號(hào) 21
4.1.9多頻信號(hào) 22
4.2音頻硬件和軟件的實(shí)現(xiàn) 23
4.2.1聲卡輸出音頻的實(shí)現(xiàn) 23
4.2.2音頻的軟件實(shí)現(xiàn) 25
4.2.3 音頻的最終實(shí)現(xiàn) 27
4.3人機(jī)界面的vc++實(shí)現(xiàn) 27
4.3.1主界面的設(shè)計(jì)和實(shí)現(xiàn) 27
4.3.2各個(gè)對(duì)應(yīng)界面的實(shí)現(xiàn) 29
第5章 軟件的調(diào)試與修改整體調(diào)試 36
5.1整體調(diào)試 36
5.1.1數(shù)據(jù)流的初步調(diào)試 36
5.1.2音頻信號(hào)的調(diào)試 36
5.2幾個(gè)問題 36
5.2.1數(shù)據(jù)信號(hào)的產(chǎn)生 36
5.2.2界面的顯示 37
5.2.3數(shù)據(jù)塊太大 37
5.2.4 directsound不能發(fā)聲 37
第6章 畢業(yè)設(shè)計(jì)總結(jié) 38
致謝 39
參考文獻(xiàn) 40
附錄1 白噪聲的算法 42
附錄2 數(shù)據(jù)流函數(shù) 43
附錄3 音頻代碼 47

摘要
 隨著電子技術(shù)的迅速發(fā)展，信號(hào)發(fā)生器的設(shè)計(jì)技術(shù)有了很大的提高，得到了迅速的發(fā)展，不但實(shí)現(xiàn)了固態(tài)化，而且出現(xiàn)了函數(shù)發(fā)生器、掃頻信號(hào)發(fā)生器、程控信號(hào)發(fā)生器等新品種儀器，主要工作特性有了極大的提高。
 本論文主要介紹了通過軟件設(shè)計(jì)的一種新型多功能音頻信號(hào)發(fā)生器。多功能音頻信號(hào)發(fā)生器主要是在計(jì)算機(jī)的控制下可以產(chǎn)生各種音頻信號(hào)，如正弦波、白噪聲、粉紅噪聲等信號(hào)以及用戶自行定義的信號(hào)。采用數(shù)字合成原理產(chǎn)生信號(hào)，頻率和幅度非常穩(wěn)定，不受硬件的外部影響，能夠得到理想的數(shù)字信號(hào)。該軟件具有完善的界面，使用者通過計(jì)算機(jī)鍵盤和鼠標(biāo)的簡單操作就可以得到理想的信號(hào)。可以得到多種波形的信號(hào)，可以在屏幕聲顯示相應(yīng)的圖形。同時(shí)，可以根據(jù)不同的信號(hào)可輸入頻率、幅度、響應(yīng)時(shí)間，相位等。本軟件通過計(jì)算機(jī)內(nèi)部的聲卡來實(shí)現(xiàn)發(fā)聲功能，具有可靠性好，功能齊全，便于產(chǎn)生信號(hào)的特點(diǎn)。
 
關(guān)鍵詞：信號(hào)發(fā)生器，directsound，信號(hào)數(shù)據(jù)，vc++，音頻
 ABSTRACT
 Along with the quickly development of electronic technology, the technology of signal generator design has got great raising ,has gotten quick development, not only have realized firmly form melt , and have arisen the new kind instruments such as some of letter raw wares, sweep signal generator and the signal generator of programmed control, major working property has got maximum raising.
 This paper mainly introduces a new multifunctional audio signal generator which is designed by software. Multifunctional audio signal generator can generate various audio signals under the control of the computer, such as sine wave、white noise、pink noise signals and signals defined by user. It uses the principle of digital synthesis to generate signal, frequency, and the amplitude is very stable and free from the external hardware, so it can get the ideal digital signal. The software have a perfect interface, the user can get an ideal signal through simple operation on the computer keyboard and mouse. The software also can get multiple waveform signals, and corresponding graphics can be shown on the screen. Meanwhile, according to the different signals, frequency, amplitude, response time and the phase can be input. The software through the computer sound card can achieve vocal function, and it has the characteristics of reliability, full range of functions, easy to generate signal.
 
Keywords: Signal generator，Directsound，Signal data，Vc++，Audio