| CABIN NOISE SOURCE-PATH IDENTIFICATIONFOR AD-200 ULTRALIGHT AIRCRAFT |
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| 作者姓名： | Yin Jianping Hu Zhangwei Zhang Qiang |
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| 作者单位： | Department of Aerodynamics，Nanjing University of Aeronauticsand Astronautics，Nanjing，China，210016 |
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| 摘 要： | ＣＡＢＩＮＮＯＩＳＥＳＯＵＲＣＥ－ＰＡＴＨＩＤＥＮＴＩＦＩＣＡＴＩＯＮＦＯＲＡＤ－２００ＵＬＴＲＡＬＩＧＨＴＡＩＲＣＲＡＦＴＹｉｎＪｉａｎｐｉｎｇ；ＨｕＺｈａｎｇｗｅｉ；ＺｈａｎｇＱｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｅｒｏｄｙｎａｍｉｃｓ，Ｎａｎｊ...
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CABIN NOISE SOURCE-PATH IDENTIFICATIONFOR AD-200 ULTRALIGHT AIRCRAFT |
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| Yin Jianping, Hu Zhangwei, Zhang Qiang.CABIN NOISE SOURCE-PATH IDENTIFICATIONFOR AD-200 ULTRALIGHT AIRCRAFT[J].Chinese Journal of Aeronautics,1995(1). |
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| Authors: | Yin Jianping Hu Zhangwei Zhang Qiang |
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| Abstract: | A new diagnostic method based on the two microphone cross spectralacoustic intensity technique was applied to identify the cabin noise source paths. Thesimulating test using a loudspeaker and an electro-mechanical shaker to simulate theairborne and structureborne noise sources was conducted to prove the confidence of theproposed method. The results show that the discrepancies between measured and sepa-rated values of total average acoustic intensity level are respectively 1.7dB(A) and0.4dB(A) for structureborne and airborne components, which is acceptable for engi-neering application. The static test with engine in operation shows that the airbornenoise through the rear board of the cabin is the dominant contnbutor to the cabin noise.This is a reasonable result, which gives a guide to cabin noise control treatment. |
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| Keywords: | sound transmission noise measurement sources ultralight aircraft |
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