@article {Makabe:2004:0736-2935:3449, title = "A geometical structure of environmental sound wave", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "2004", volume = "2004", number = "4", publication date ="2004-08-22T00:00:00", pages = "3449-3452", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2004/00002004/00000004/art00098", keyword = "56.1, 76.1.1", author = "Makabe, Yoshiaki and Shibayama, Hideo", abstract = "", }