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Individual exposure monitoring of the airborne styrene concentrations was performed, as well as biological monitoring, based on the urinary concentration of two styrene metabolites, the Mandelic and Phenylglyoxylic acids. Noise exposure was evaluated using wearable phonometers, and hearing loss with pure tone audiometry. Due to their different job tasks, one group of workers was exposed to high noise and low styrene levels, another group to higher styrene levels, close to the limit of 20\u2009ppm, and to low noise levels. A significant negative correlation was found between the otoacoustic emission levels and the concentration of the styrene urinary metabolites. Otoacoustic emissions, and particularly distortion products, were able to discriminate the exposed workers from the controls, providing also a rough estimate of the slope of the dose-response relation between otoacoustic levels and styrene exposure.<\/jats:p>","DOI":"10.1121\/1.4824618","type":"journal-article","created":{"date-parts":[[2013,11,1]],"date-time":"2013-11-01T23:32:03Z","timestamp":1383348723000},"page":"3739-3748","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":27,"title":["Otoacoustic emission sensitivity to exposure to styrene and noise"],"prefix":"10.1121","volume":"134","author":[{"given":"R.","family":"Sisto","sequence":"first","affiliation":[{"name":"Occupational Hygiene Department, INAIL Research , Monteporzio Catone (Roma), Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Cerini","sequence":"additional","affiliation":[{"name":"Occupational Hygiene Department, INAIL Research , Monteporzio Catone (Roma), Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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