Public expectations of lower environmental noise levels, and increasingly stringent legislative limits on aircraft noise, result in noise being a critical technical issue in the development of jet engines.
During 1999 2001 the building research establishment (BRE) undertook a measurement based survey of environmental noise levels and a social survey of population attitudes to environmental noise in the UK.
The toluene plus noise group was further stratified into subgroups based on the environmental noise levels [< 85 dB(A) and ≥ 85 dB(A)].
For example, triple-glazed windows not only save energy but also reduce environmental noise levels inside buildings (Garg et al. 2011).
Conclusion: Significant public health benefit can be achieved by integrating interventions that reduce environmental noise levels and exposures into the federal public health agenda.
On-site environmental noise levels for areas of the three study groups were assessed using sound pressure level meters (model B&K 2260; Bruel and Kjaer, Naerum, Denmark) based on the Taiwan Council of Labor requirements (IOSH 1999).
The high HL workers were significantly older and had higher environmental noise levels as well as a higher proportion of PPE use at work than the low HL workers.
For subjects working in sites with environmental noise levels > 85 dBA, audiometric tests were performed at 500, 1,000, 2,000, 3,000, 4,000, 5,000, and 6,000 Hz for both ears annually.
