基于GUI图形化设计的古建筑声学信号发生器

Ancient architecture acoustic signal generator based on GUI graphical design

古建筑声学现象具有重要的文化价值,其测量和分析均依赖现场采集的数据,实验室使用的信号发生器便携性较差,价格比较高不适用于室外测量,具有强大数据分析和处理能力的Matlab软件成为最佳选择.本文介绍基于声卡和matlab设计的虚拟图形化信号发生器,其具有生成建筑声学需求的特殊频率信号能力,提供频率自定义和脉冲调制功能,可实现白噪声发生功能.本文给出了具体实现方法和实际采集的波形结果.

Ancient architecture acoustic phenomenon has important cultural value,which is measured and analyzed based on field observations. The signal generator with poor portability and more expensive,which is used in the laboratory,is not suitable for outdoor measurement. The matlab is the best choice with powerful data analysis and processing function. In this paper,the virtual graphical signal generator based on computer sound card and matlab,with signal generation function which conforms to the special frequency in architectural acoustics measurement field,provides the customizable sine signal function,pulse modulation function and white noise function. The program and GUI based on matlab are given in detail. The waveform from the virtual graphical signal generator is collected by BK Pulse system for verifying the design.