Advertisement

Critical Peak Level for Impulse Noise Hazard: Permanent Hearing Threshold Shifts in Military Drill Squads Following Known Variation of Impulse Noise Exposure

  • H. M. Borchgrevink
  • O. Woxen
  • G. Oftedal
Part of the NATO ASI Series book series (NSSA, volume 111)

Abstract

From 1982 to 1983, new recruits of The Royal Norwegian Guards Ceremonial Drill Squad (n=32, males, 20 yrs), on their own initiative, changed from low horizontal to high vertical rifle positions during ceremonial firing. In addition, they used the more powerful brass Energa 7.62 mm blank ammunition when firing a simultaneous round which ended each of the 20 official ceremonial drill performances distributed over a 3 months period. The soldiers did not use hearing protection during these ceremonies. Permanent noise-induced hearing losses in the 1983 squad were substantially increased (Fig. 1). Apart from this change, routine and training programs were identical. This gave us the unique opportunity to make a retrospectively-designed, controlled study on the effects of known variations of weapon position and impulse noise exposure on permanent noise-induced hearing losses in man. This was accomplished by letting the 1984 Drill Squad (new recruits) go through the drill program with 1982 red blank ammunition and 1983 (vertical) weapon position under audiometric surveillance.

Keywords

Hearing Loss Noise Exposure Impulse Noise Single Round Hearing Protection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    H. M. Borchgrevink, Hearing and Hearing Prophylaxis, Proc. Oslo Int. Sympo. Effects of Noise and Hearing, Scand. Audiol. Suppl., 16:65 (1982).Google Scholar
  2. 2.
    H. M. Borchgrevink, Editor’s Summary, in: Effects of Noise and Hearing, H. M. Borchgrevink ed., Scand. Audiol. Suppl. 16:122 (1982).Google Scholar
  3. 3.
    B. M. Johnstone D. Robertson and A. Cody, Basilar membrane motion and hearing loss, in: Effects of Noise and Hearing, H. M. Borchgrevink ed., Scand. Audiol. Suppl. 16:89 (1982).Google Scholar
  4. 4.
    D. Henderson, R. J. Salvi and R. P. Hamernik, Is the equal energy rule applicable to impact noise, in: Effects of Noise and Hearing, H. M. Borchgrevink ed., Scand. Audiol. Suppl. 16:71 (1982).Google Scholar
  5. 5.
    K. Buck, Influence of different presentation patterns of a given noise dose on hearing in guinea-pig, in: Effects of Noise and Hearing, H. M. Borchgrevink ed., Scand. Audiol. Suppl. 16:83 (1982).Google Scholar
  6. 6.
    G. Smoorenburg, Damage risk criteria for impulse noise, in: New Perspectives on Noise-induced Hearing Loss, R. P. Hamernik, D. Henderson and R. J. Salvi eds., Raven Press, New York (1982).Google Scholar

Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • H. M. Borchgrevink
    • 1
  • O. Woxen
    • 1
  • G. Oftedal
    • 2
  1. 1.Joint Medical Service of the Norwegian Armed ForcesFSAN, Oslo mil/HusebyOslo 1Norway
  2. 2.ELABNTHTrondheimNorway

Personalised recommendations