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CC BY-NC-ND 4.0 · Semin Hear 2023; 44(04): 485-502
DOI: 10.1055/s-0043-1769498
Review Article

Noise Exposure and Hearing Loss among Workers at a Hammer Forge Company

Autoren

  • Scott E. Brueck

    1   Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio

  • Judith Eisenberg

    1   Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio

  • Edward L. Zechmann

    1   Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio

  • William J. Murphy

    2   Stephenson and Stephenson Research and Consulting, LLC, Batavia, Ohio

  • Edward Krieg

    1   Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio

  • Thais C. Morata

    1   Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
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Abstract

The National Institute for Occupational Safety and Health (NIOSH) evaluated continuous and impact noise exposures and hearing loss among workers at a hammer forge company. Full-shift personal noise exposure measurements were collected on forge workers across 15 different job titles; impact noise characteristics and one-third octave band noise levels were assessed at the forge hammers; and 4,750 historic audiometric test records for 483 workers were evaluated for hearing loss trends. Nearly all workers' noise exposures exceeded regulatory and/or recommended exposure limits. Workers working in jobs at or near the hammers had full-shift time-weighted average noise exposures above 100 decibels, A-weighted. Impact noise at the hammers reached up to 148 decibels. Analysis of audiometric test records showed that 82% of workers had experienced a significant threshold shift, as defined by NIOSH, and 63% had experienced a standard threshold shift, as defined by the Occupational Safety and Health Administration (OSHA). All workers with an OSHA standard threshold shift had a preceding NIOSH significant threshold shift which occurred, on average, about 7 years prior. This evaluation highlights forge workers' exposures to high levels of noise, including impact noise, and how their hearing worsened with age and length of employment.

Keywords

noise - impact noise - noise-induced hearing loss - hearing loss - hammer forge

Disclaimer

The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention.




Publikationsverlauf

Artikel online veröffentlicht:
16. Juni 2023

© 2023. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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