World Library  
Flag as Inappropriate
Email this Article

Industrial noise

 

Industrial noise

Industrial noise, or occupational noise, is often a term used in relation to environmental health and safety, rather than nuisance, as sustained exposure can cause permanent hearing damage. Industrial noise is a hazard traditionally linked to heavy industries such as ship-building and associated with noise-induced hearing loss (NIHL), a form of occupational hearing loss. Modern thinking in occupational safety and health further identifies noise as hazardous to worker safety and health in many places of employment and by a variety of means.

Noise can cause hearing impairment at long-term exposures of over 85 decibels (known as an exposure action value), and it also acts as a causal factor for stress and raises systolic blood pressure.

Noise can be a causal factor in work accidents, both by masking hazards and warning signals, and by impeding concentration. Noise acts synergistically with other hazards to increase the risk of harm to workers. In particular, noise and dangerous substances (e.g. some solvents) that have some tendencies towards ototoxicity may give rise to rapid ear damage.

A-weighted measurements are commonly used to determine noise levels that can cause harm to the human ear, and special exposure meters are available that integrate noise over a period of time to give an Leq value (equivalent sound pressure level), defined by standards.

Contents

  • Reduction 1
  • Regulation 2
  • See also 3
  • References 4
  • External links 5

Reduction

Acoustic quieting is the process of making machinery quieter by damping vibrations to prevent them from reaching the observer.

Noise decreases as distance from its source increases. When two identical noise sources are side by side producing a recorded noise of, say, 100 dB(A) the reduction in noise from removing one of the noise sources is about 3 dB, resulting in 97 dB(A). When the distance to a noise source is doubled the recorded noise level is reduced by 6 dB, sometimes called the Rule of 6.

The noise attenuation in decibels at a distance from the source d, knowing the SPL at distance d_0, is 20log_{10}\left(\frac{d}{d_0}\right). If the distance is doubled, i.e. \left(\frac{d}{d_0}\right)=2, the attenuation becomes 6.02 dB (6 for most practical purposes).

Regulation

Since the hazards of occupational noise exposure were realised, programs and initiatives such as the US Buy Quiet program have been set up to regulate or discourage noise exposure. The Buy Quiet initiative promotes the purchase of quieter tools and equipment and encourages manufacturers to design quieter equipment.[1]

Industrial noise can also be regulated by legislation. A 2012 Cochrane review found low-quality evidence that legislation reduced industrial noise both immediately and in the long-term.[2]

See also

General:

References

  1. ^ http://www.cdc.gov/niosh/topics/buyquiet/default.html
  2. ^ Verbeek, Jos H.; Kateman, Erik; Morata, Thais C.; Dreschler, Wouter A.; Mischke, Christina (2012). "Interventions to prevent occupational noise-induced hearing loss". The Cochrane Database of Systematic Reviews 10: CD006396.  

External links

  • Occupational Safety & Health Administration
  • NIOSH Buy Quiet Topic Page
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.