典型舱音背景声在消声室中测试分析研究.pdf

文档介绍：2 2 2
2 2 2 2 2
2
2
2
2
2009年 6月噪声与振动控制第 3期
文章编号: 1006 1355 (2009) 03 0104 03
典型舱音背景声在消声室中测试分析研究
程道来 1, 2 , 仪垂杰 1 , 张志强 1 , 刘志红 1 , 姚红宇 3
(1. 青岛理工大学青岛市能源与环境装备工程技术研究中心,山东青岛 266033;
2. 上海应用技术学院建安学院,上海 200233; 3. 中国民航总局航空安全技术中心,北京 100028)
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 LMS SC305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
2
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。
关键词: 声学;飞机;消声室;舱音背景声;谱分析
中图分类号: V328; TB53 文献标识码: A
M ea surem en t & Ana lysis of Typ ica l Cockp it
Background Sound in Anecho ic Room
CHEN G D ao lai1, 2 , YI Chui jie1 , ZHANG Zhi qiang1 , L IU Zhi hong1 , YAO Hong yu3
(1. Q ingdao R&D Center of Energy and Environmental Equipment, Q ingdao
Technological University, Q ingdao Shandong 266033, China;
2. School of Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 200233, China;
3. Center of Aviation Safety Technology, CAAC, Beijing 100028, China)
Abstract: In virtue of good quality of the free sound field environment in anechoic room, four typ i
cal cockp it background sounds of the real aviating airp lane and the training p lane were measured and ana
lyzed with the aid of LMS SC305 instrument and its software. Results indicate that the measured charac
teristic frequency spectrum s of cockp it background sounds are in accordance with puted ones. The