Audiology and hearing health professionals in developed and developing countries (2002), Lyn et al. (1998), and Swart et al. (1995), impacted cerumen is one of the most common ear diseases and causes of hearing loss, with prevalence rate between 7.4% and 63%. Additionally, otoscopy does not require a great deal of expertise beyond basic training and is useful to refer a child when the tympanic membrane cannot be visualized due to occlusion of the external auditory meatus by cerumen. Pure-tone audiometry screening, in which there is typically no attempt to find threshold, has been found to accurately assess hearing status in children six years and older, when trained health workers
Substance 1987 singles compilation by New Order's predecessor band Joy Division, also entitled "Substance (Joy Division album)". While "Substance" presents a sizeable collection of singles, there are many omissions and differences to be found from the original single releases: The standard tape version, due to the extra space befitting the format, also contains extra tracks in the form of "Dub-vulture", "Shellcock", and "Bizarre Dub Triangle", as well as the actual "Mesh" (mislabeled "Cries and Whispers", again identically to the "Everything's Gone Green" sleeve). Only on the limited edition cassette version does "True Dub" appear, as the last track on the second tape.