Functional correlates of cochlear injury.

Details

• Personal Author:
  Bohl CD ; Bohne BA ; Clark WW
• Description:
  The effects of noise frequency, intensity, duration, and scheduling on the magnitude, pattern, and growth of hearing loss and structural damage were discussed. The behavioral and anatomical correlates of presbycusis in aged, but unexposed, animals were investigated. Laboratory studies were conducted in behaviorally trained chinchillas with hearing similar to humans. With continuous exposures which mimic an occupational lifetime, the amount of hearing loss measured after the first days of exposure sets the upper bound of permanent hearing loss that will be produced by that exposure. Exposures to noise on an interrupted schedule with rest periods interspersed caused less hearing loss than equal energy continuous exposures. The ear appeared to be toughened or made more resistant to subsequent noise when exposed on some interrupted schedules. Anatomical evaluation of young and old exposed ears showed that older ones were equally susceptible to noise induced hearing loss as younger ears. Data collected from field studies indicated that hearing levels of US industrial workers, either newly employed or those working in low noise environments, were worse than those reported as representative of an unscreened population of Americans. Hearing levels of young individuals differed little by gender or race. However, with increasing age, hearing in white males deteriorated more severely at 3,000, 4,000, and 6,000 hertz than that observed in white females and African American males and females. [Description provided by NIOSH]
• Content Notes:
  in NTRL, no pdf
• Subjects:
  Ear Hearing Loss, Noise-Induced Laboratories Noise Noise, Occupational Occupational Exposure Occupational Health Safety Sense Organs
• Keywords:
  NIOSH-Grant; Noise-induced-hearing-loss; Ear-disorders; Noise-exposure; Industrial-noise; Noise-measurement; Laboratory-animals; Occupational-exposure
• Series:
  Grant Final Reports
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Missouri ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:00228272
• NTIS Accession Number:
  PB95270302
• Citation:
  Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, R01-OH-002128, 1995 Jan; :1-423
• Contact Point Address:
  Research Central Inst for the Deaf 818 South Euclid St Louis, MO 63110
• Federal Fiscal Year:
  1995
• NORA Priority Area:
  Disease and Injury: Hearing Loss
• Performing Organization:
  Central Institute for the Deaf, Saint Louis, Missouri
• Peer Reviewed:
  False
• Start Date:
  19840901
• Source Full Name:
  National Institute for Occupational Safety and Health
• End Date:
  19991130
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/246301/cdc_246301_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]