@article {Ingemansson:1996:1021-643X:159,
title = "Noise control: Principles and practices - Part 9",
journal = "Noise News International",
parent_itemid = "infobike://ince/nni",
publishercode ="ince",
year = "1996",
volume = "4",
number = "3",
publication date ="1996-09-01T00:00:00",
pages = "159-167",
itemtype = "ARTICLE",
issn = "1021-643X",
url = "https://ince.publisher.ingentaconnect.com/content/ince/nni/1996/00000004/00000003/art00002",
doi = "doi:10.3397/1.3703024",
author = "Ingemansson, Stig",
abstract = "This is the ninth of fifteen parts that present illustrations of noise control principles and practices. The illustrations in this article appeared first in a book published in Sweden by the Swedish Work Environment Fund. Illustrated are cover plates with large perforations that do
not reduce absorption, panels on studs that absorb low frequency noise, sound barriers used in combination with sound absorbing ceilings and changes in ducts that reduce sound transmission.",
}