中文摘要：

基于全消声室良好的自由声场环境特性和声学测试原理，用LMSSC305对真实飞机和模拟机驾驶舱中的开关提示等4种典型舱音背景声在全消声室中进行测试分析应用研究。结果表明：基于全消声室测试的舱音特征谱值与理论计算结果一致，且比传统的人工译码辩听和音频分析的结果准确，验证舱音特征谱值计算结果的可靠性。

英文摘要：

In virtue of good quality of the free sound field environment in anechoic room, four typical cockpit background sounds of the real aviating airplane and the training plane were measured and analyzed with the aid of LMS SC305 instrument and its software. Results indicate that the measured characteristic frequency spectrums of cockpit background sounds are in accordance with the computed ones. The measurement results are more accurate and reliable than those of the traditional distinguishing method with cockpit voice decoding and frequency analysis by human-audio.