@article {Nijs:2010:0736-2935:2939, title = "Optimum absorption and vocal output in classrooms calculated with U_50", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "2010", volume = "2010", number = "8", publication date ="2010-06-13T00:00:00", pages = "2939-2948", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2010/00002010/00000008/art00029", keyword = "51.1.4, 51.2", author = "Nijs, Lau and Rychtarikova, Monika", abstract = "", }