【摘要】 利用Schroeder反向积分法原理,基于图形化编程语言LabVIEW8.6开发了测量混响时间的虚拟仪器SoundExpress,深入研究了脉冲响应的获取、滤波、信号去噪及声压级曲线拟合等关键的信号处理问题,详细介绍了SoundExpress测量系统的组成和程序构架,并验证了其测量性能。实验表明SoundExpress测量结果可靠,性能稳定。更多还原

【Abstract】 According to Schroeder backward integration principle,the virtual instrument Sound Express to measure reverberation time is developed based on graphical programming language LabVIEW8.6.The key problems of signal processing such as acquisition of pulse response,filtering,signal denoising and sound pressure level curve fitting are researched in depth.The composition of Sound Express measuring system and the program frame are introduced in detail.The measuring performance of Sound Express is verified by experiments,and it is show that the Sound Express has reliable measurement results and stable performance.更多还原