@techreport{oai:jaxa.repo.nii.ac.jp:00045340,
 author = {武田, 克巳 and 西脇, 英夫 and 藤井, 昭一 and TAKEDA, Katsumi and NISHIWAKI, Hideo and FUJII, Shoichi},
 month = {Sep},
 note = {It is generally recognized that airframe noise becomes a significant contributor to overall aircraft noise under landing conditions. Airframe noise is considered to be the sound radiated aerodynamically as a result of complex interplay between local flows and cofigurations that intrude or are recessed or deployed over the lifting surfaces and fuselage. The scale model acoustic testing of landing gears done by the authors revealed that the cavity noise was predominant in sound sources of landing device. As the succeeding phase of the test, here we report a study made to determine the sound generation mechaism and to reduce the sound level of the cavity noise. It is observed that an array of fins attached on the leading edge of the cavity offered a reduction of 7～8 dB in the sound pressure levels., 資料番号: NALTR1081000, レポート番号: NAL TR-1081},
 title = {The Reduction of Cavity Noise at Subsonic Speeds},
 year = {1990}
}