基于声卡的音频信号采集与分析系统设计

声卡作为数据采集卡具有价格低廉、开发容易和系统灵活等优点。本文详细介绍了系统的开发背景，软件结构和特点，系统地分析了数据采集硬件和软件设计技术，在此基础上以声卡为数据采集卡，以LabVIEW为开发平台设计了音频信号采集与分析系统。该系统具有界面友好，维护简单等优点。系统不但可以实现对音频信号进行采集，还可以对采集的信号进行分析和保存。用户可以根据需要改变系统的功能，具有很好的教学实验效果。

Audio signal acquisition and analysis system design based on sound card

Compared with the data acquisition card, the sound card has the following merits. low-price, easy-developing and flexible-system. In this paper, the design technology of hard ware and software has been introduced in detail, including the background, the structure. On this base, the sound card and LabVIEW has been used to develop the audio signal acquisition and analysis system, which can be used to acquire and analyze the audio signal. The system has better interface which can be maintained easily. In order to meet the need, the function of the system can be modified. It has been indicated in the application that the system has great sense in teaching and experiment.