@article {Bruel:1993:0736-2935:165, title = "Variation of noise level from aircraft", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1993", volume = "1993", number = "6", publication date ="1993-08-24T00:00:00", pages = "165-170", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1993/00001993/00000006/art00025", keyword = "13.1, 52.2", author = "Bruel, Per V.", abstract = "", }