摘要
发展了一种由１１１个传声器组成的Ｍ维平面传声器阵列测量技术，１１１个传声器在平面阵列中的位置应用随机优化的方法确定，从而保证平面传声器阵列在感兴趣的测量频率范围内具有理想的性能，并应用数值模拟的方法检验了平面传声器阵列的频谱特性．应用此平面传声器阵列对当前流行的民用客机进场着陆过程中飞机噪声源进行了测量分析，实验结果表明应用此项技术可以辨别出在飞机表面上所有重要的噪声源，并可获得全尺寸飞机机体重要噪声源的详细的频谱特性、指向特性和声级变化．
A large planar microphone array, which consists of 111 microphones, was successfully developed. The positions of 111 microphones in the array were determined by a random optimization procedure for the largest possible amplification and dynamic range. The beam pattern of planar array was obtained by numerical calculation. This planar array was applied to measure a two-dimensional mapping of the sound sources on landing aircraft. It is shown that important airframe noise sources can be identitied. The spectra and directivity of any interested noise source can also be obtained by this measurement.
出处
《声学学报》
EI
CSCD
北大核心
2001年第2期161-168,共8页
Acta Acustica
