@article {Allam:2012:0736-2501:707, title = "Noise control for cooling fans on heavy vehicles", journal = "Noise Control Engineering Journal", parent_itemid = "infobike://ince/ncej", publishercode ="ince", year = "2012", volume = "60", number = "6", publication date ="2012-11-01T00:00:00", pages = "707-715", itemtype = "ARTICLE", issn = "0736-2501", url = "https://ince.publisher.ingentaconnect.com/content/ince/ncej/2012/00000060/00000006/art00006", doi = "doi:10.3397/1.3701042", keyword = "11.4.1, 13.2.4", author = "Allam, Sabry and Abom, Mats", abstract = "In this paper two different objects for fan passive noise control have been examined: heat exchangers and inlet/outlet parallel splitter silencers based on micro-perforated panels. The first object is theoretically and experimentally examined while the second is only examined experimentally. Throughout this paper two measurement methods were used. The ISO 15186-1:2000 to test the acoustic transmission for a diffuse field and plane wave testing in a duct of a sample cut from each heat exchanger type. Based on an anisotropic equivalent fluid model a theoretical model for the heat exchanger acoustic transmission is presented. A new type of splitter silencers based on micro-perforated plates, which can add damping up 10-20 dB in the frequency range of interest (<5 kHz), are also presented.", }