@article {Sakamoto:2006:0736-2935:4159, title = "Basic study for the acoustic characteristics of granular material (normal incidence absorption coefficient for multilayer between different grain diameters)", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "2006", volume = "2006", number = "3", publication date ="2006-12-03T00:00:00", pages = "4159-4164", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2006/00002006/00000003/art00076", keyword = "76, 35.1", author = "Sakamoto, Shuichi and Watanabe, Seiji and Yanagimoto, Kensaku and Sakuma, Yosuke", abstract = "", }