Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Cao Da and Aida Yu and Inoue Naohisa and Sakuma Tetsuya,Modification of single-degree-of-freedom models for standard heavy-weight impact sources,Acoustical Science and Technology,1346-3969,ACOUSTICAL SOCIETY OF JAPAN,2025-05-01,46,3,242-245,https://cir.nii.ac.jp/crid/1390866979074493568,https://doi.org/10.1250/ast.e24.111