Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Nagata Minoru,Acoustic Design of a New Echo Chamber with Variable Reverberation Characteristics,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,1967,23,6,433-441,https://cir.nii.ac.jp/crid/1390001206564629504,https://doi.org/10.20697/jasj.23.6_433