飞机舱音背景声特征实时分析系统开发及应用

Development and application of real-time analysis system on cockpit voice background sound in airplane

对飞机机载驾驶舱话音记录器记录的非人声舱音信号分析,已从利用计算机音频处理的记录器译码系统进行辨听发展到基于小波变换理论、线性调频Z变换等方法的分析,但这些都是离线分析。为避免离线分析缺点,提出了舱音背景声特征实时分析系统开发的新思路及实现流程;然后基于Matlab与VC++混合编程原理,在VC++环境下调用工具箱函数及自编m函数;最后以典型舱音背景声为例,实现在专用音频软件Adobe Audition界面下的实时分析,提供了高效、方便的舱音背景声频谱特征提取途径。

The domestic cockpit voice signal＇s identification methods have been improved from the Cockpit Voice Recorder recovery system to wavelet transformation or chirp z transform （CZT）,and so on.However,all these are off-line analysis methods. Using MATLAB ＆ VC＋＋ Mixed-Programming principle and calling the Wavelet toolbox functions ＆ self-programmed .m functions of MATLAB in VC＋＋ compiler platform,a real-tittle analysis system on background sound in cockpit voice has been developed to conveniently withdraw the sound spectrum characteristics for cockpit background sound.Finally,a typical example has been applied.