@article {Hong:1994:0736-2935:1327, title = "Active sound absorption in the free field: Theory", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1994", volume = "1994", number = "4", publication date ="1994-09-29T00:00:00", pages = "1327-1330", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1994/00001994/00000004/art00073", keyword = "38.2, 35", author = "Hong, Hou and Chong, Wang and Jianhua, Yang and Jincai, Sun", abstract = "", }