“…1•1 Balas, 1978, Spencer and Sain, 1997, 1998MacMartin and Hall, 1991Brillouin, 2003 No.21-00228 [DOI: 10.1299/transjsme.21-00228] MacMartin and Hall, 1991Miller et al, 1990, Mei, 2002, Svensson et al, 2008, Airoldi and Muzzene, 2011Spadoni et al, 2009, Iwamoto et al, 2013, Sorokin et al, 2020) Wang et al,1995, Ojima et al, 2002, O'Connor and Zhu, 2013Duhamel et al, 2006, Mace and Manconi, 2008, Nobrega et al, 2016, Hong et al, 2018) Matsuda and Fujii, 1995 s = jω…”