This is an interesting article published in July 2012 which is a study to estimate the prevalence of hearing loss amongst workers in US industries titled “Prevalence of hearing loss in the United States by industry”
The abstract of the article is as follows:
Twenty-two million workers are exposed to hazardous noise in the United States. The purpose of this study is to estimate the prevalence of hearing loss among U.S. industries.
The link to the article on the Wiley Online Library is here
Citation: Masterson, E. A., Tak, S., Themann, C. L., Wall, D. K., Groenewold, M. R., Deddens, J. A. and Calvert, G. M. (2012), Prevalence of hearing loss in the United States by industry. Am. J. Ind. Med.. doi: 10.1002/ajim.22082