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Inverse Method of Microphone Array and Aircraft Noise Source Identification
MA Jun-hui;QIAO Wei-yang;TAN Hong-chuan;ZHAO Lei
   2011, 31 (2): 163-169.   DOI: 10.3969/j.issn.1006-1355-2011.02.039
Abstract2040)            Save
In order to develop and improve the technique of identification and measurement of aircraft noise source, and to understand the essential properties of the noise source deeply, a large planar microphone array for the landing process of large civil aircraft has been developed. This plane array is composed by 104 microphones whose positions in the plane are determined by the computer aided optimization design. Meanwhile, the spectrum characteristics of the array have been tested by means of numerical simulation. The plane array has been used to measure the noise sources of 20 landing aircrafts in the Xi’an Xianyang International Airport. In the experiment, a noise source identification and measurement system for large civil aircraft has been built and developed, and the microphone array technique and its data processing software also have been verified.
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《Application of DAMAS Method of Microphon Array for Measurement of Airplane Noise》
SUN Shuang;QIAO Wei-yang;HUANG Xiao-dan
   2009, 29 (5): 121-126.  
Abstract2561)      PDF(pc) (1595KB)(1081)       Save

A newlydeveloped method for microphone array  deconvolution method (Deconvolution Approach for the Mapping of Acoustic Sources, DAMAS) is introduced in this paper. Deconvolution method makes beamforming as preprocessing and extracts useful soundsource information from it. Then, a more accurate result can be obtained. Firstly, an experiment of noise measurement for the plane operating in static is carried out based on the microphone array, and the result is analyzed. The analysis is used to validate the feasibility and precision of the deconvolution method. Moreover, an average Doppler frequencyshift factor combined with the deconvolution method is applied to measure the overhead plane noise. The measurement result is compared with that by using traditional method.

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