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Noise and Military Service Implications for Hearing Loss and Tinnitus (2006) / Chapter Skim
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Appendix C Definitions
Pages 217-222

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From page 217...
... The reference quantity in the denominator of the ratio is either a sound pressure of 20 micropascals (µPa) or a sound intensity of 10­12 watts/m2.
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From page 218...
... For the purpose of this document, it refers to impact or impulse noise. Intermittent noise: Noise levels that are interrupted by intervals of relatively low sound levels.
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From page 219...
... . Significant threshold shift: A shift in hearing threshold, outside the range of audiometric testing variability (±5 dB)
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From page 220...
... . Weighted sound pressure levels: Two weighting curves are commonly applied to measures of sound levels to account for the way the ear responds to sound (ANSI, 1994)
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From page 221...
... 1998. Criteria for a Recom mended Standard -- Occupational Noise Exposure Revised Criteria.
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Key Terms

  • noise levels
  • impulse noise
  • noise exposure
  • pressure levels
  • audiometric test

  • occupational noise
  • sound pressure
  • audiometric testing
  • noise level
  • sound level

  • hearing conservation


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