基于LabVIEW和声卡的音频分析仪设计  

Design of audio analyzer based on LabVIEW and sound card

作　　者：周南权[1] 全晓莉[2] 

机构地区：[1]重庆航天职业技术学院电子工程系,重庆400021 [2]重庆理工大学电子信息与自动化学院,重庆400054

出　　处：《实验技术与管理》2012年第8期63-66,共4页Experimental Technology and Management

基　　金：重庆市高等教育教学改革研究重点项目(102404)

摘　　要：提出了一种基于声卡和LabVIEW的音频信号采集分析系统的设计方案。利用声卡把语音信号采集进入计算机,再利用LabVIEW图形化编程语言对音频信号进行时频域分析。实际应用表明:该系统的硬件和软件设计简单,开发周期短,成本低,采样精度高,同时又具有很强的兼容性和扩展性,易于升级换代和维护。此外,用户还可以在PC上配置多块声卡并行工作,实现多通道采集系统。声卡与LabVIEW相结合的信号采集技术在工程测试测量以及教学实践领域中具有广阔的应用前景。An audio signal acquisition-analysis-system project based on the sound card and LabVIEW is provided,considering that the sound card is the basic configuration of computers and its low price,practicability,and the function as a data acquisition board within the range of audio frequency.Audio signals were collected into computer through sound card,then analysed both in time domain and frequency domain by using graphic programming language in LabVIEW.Practical applications of this project prove that both the software part and the hardware part of this system can be easily designed and there are many other advantages like short development circle,low-cost,high acquisition accuracy,strong compatibility and extensibility,easy to upgrade and maintain.Furthermore,users can realize multi-channel acquisition system by adding several sound cards on their PCs and making these sound cards work in parallel.In conclusion,this signal-acquisition technique combining sound cards and LabVIEW has very broad prospect in the area of engineering measurement and teaching practice.

关 键 词：音频分析仪 声卡 LABVIEW 虚拟仪器 

分 类 号：TN911.6[电子电信—通信与信息系统]