@techreport{oai:jaxa.repo.nii.ac.jp:00044186, author = {渡辺, 実 and 武田, 克巳 and 鳥崎, 忠雄 and WATANABE, Minoru and TAKEDA, Katsumi and TORISAKI, Tadao}, month = {Feb}, note = {Parametric studies of acoustic duct attenuation of perforated-plate-on-honey-comb absorbers were conducted using a flow duct facility with duct airflow Mach number from -0.6 to 0.6. Open area ratio of face sheets from 0.01 to 0.09 and core depth from 10 to 40 mm were tested with constant duct size of 200 mm. The influence of these parameters as well as duct airflow Mach number was discussed., 資料番号: NALTM0603000, レポート番号: NAL TM-603}, title = {多孔板ハネカム吸音ライナの減音特性}, year = {1989} }