@article {Lang:1975:0093-9978:108, title = "A Noise Emission Number for Product Designation", journal = "Noise Control Engineering", parent_itemid = "infobike://ince/nce", publishercode ="ince", year = "1975", volume = "4", number = "3", publication date ="1975-05-01T00:00:00", pages = "108-113", itemtype = "ARTICLE", issn = "0093-9978", url = "https://ince.publisher.ingentaconnect.com/content/ince/nce/1975/00000004/00000003/art00002", doi = "doi:10.3397/1.2831993", author = "Lang, W. W. and Flynn, D. R.", abstract = "", }