【正文】 tomize according to the needs of users, provides a new way to realize the voice signal acquisition and analysis. In the design of the whole system, bined with the design method of voice signal analysis of functional requirements and labview, from two aspects of hardware and software design of the whole system. The most important is the choice of sensor, under the precondition of ensuring the reliability and feasibility, with a total count machine es with its own sound card to replace the traditional data acquisition card for sound signal acquisition, can achieve kHz sampling frequency, and 16 of the sample quantile, and can choose the single channel and dual channel. And then plete the signal analysis software in labview platform, to achieve the sound capture and playback, and Analysis of sound analysis, including the extraction of the transient characteristics of the sound signal, filtering, spectrum analysis, power analysis, harmonic distortion analysis. System after the test, to meet the demand for voice signal analysis, low price, flexible, easy to upgrade, good versatility. Can applied to vibration sound, speech signals, signal detection and analysis, application in the scientific research work of the voice signal, and virtual instrument teaching, we can say that it is very broad application prospects. KEY WORDS: sound signal, virtual instrument, labview, sound card collection 2020 屆機(jī)械電子工程專業(yè)（論文） III 目 錄 摘 要 ................................................................................................................................. I Abstract .............................................................................................................................II 前 言 ............................................................................................................................... V 第一章 緒論 .................................................................................................................... 1 選題的目的與意義 ............................................................................................ 1 課題主要研究內(nèi)容 ............................................................................................ 1 論文的組織結(jié)構(gòu) ................................................................................................ 2 第二章 聲音的描述 ........................................................................................................ 3 分貝 .................................................................................................................... 3 分貝的運(yùn)算法則 ..................................................................................... 3 為什么采用分貝 ..................................................................................... 3 聲壓 ................................................................................................................... 4 聲壓的定義 ............................................................................................. 4 聲壓與聲強(qiáng)的關(guān)系 ................................................................................. 4 聲壓級(jí) ................................................................................................................ 4 什么是聲壓級(jí) ......................................................................................... 4 工作原理 ................................................................................................. 5 傳聲器 ..................................................................................................... 5 放大器 ..................................................................................................... 5 計(jì)權(quán)網(wǎng)絡(luò) ................................................................................................. 5 第三章 虛擬儀器、 labview 及聲音采集簡介 ............................................................... 7 ................................................................................................ 7 虛擬儀器的概念 ..................................................................................... 7 虛擬儀器的特點(diǎn) ..................................................................................... 7 簡介 ........................................................................................................ 7 labview 的系統(tǒng)組成及應(yīng)用 .................................................................... 7 測試軟件控制 ......................................................................................... 8 聲音采集介紹 .................................................................................................... 8 聲音采集的概念 ..................................................................................... 8 聲音采集的特點(diǎn)： ................................................................................. 8 第四章 基于 labview 的聲音采集方案設(shè)計(jì) ................................................................ 10 ：基于虛擬儀器的聲音采集系統(tǒng)設(shè)計(jì) IV 聲音信號(hào)采集方案 ..........................................................................................10 聲卡作為聲音信號(hào)采集裝置的可行性分析 ..................................................10 聲卡的基本結(jié)構(gòu) .............................................................................................. 11 聲音控制芯片 ........................................................................................ 11 數(shù)字信號(hào)處理器 .................................................................................... 11 合成芯片 ..........................................................................................12 波形合成表 ............................................................................................12 波表合成器芯片 ....................................................................................12 聲卡的工作原理 .......................................................