Noise-Induced Hearing Loss from Non-Gaussian Equal Energy Exposures

Details

• Personal Author:
  Davis RI ; Hamernik RP ; Qiu W
• Description:
  Data from several different exposures showed that, for equivalent energy [Leq =100 dB9A)] and spectra, exposure to a continuous, non-Gaussian (nonG) noise produces greater hearing and sensory cell loss in the chinchilla than a Gaussian (G)noise. The statistical metric, kurtosis, could order the extent of the trauma. We extend these results to Leq=90 and 110 dB(A), non-Gaussian noises generated using broadband noise bursts, and bandlimited impacts within a continuous G background noise. Data from nine new experimental groups with 11 or 12 chinchillas/group will be presented. Evoked response audiometry established hearing thresholds and surface preparation histology quantified sensory cell loss. There were clear intensity-related effects. At the lowest levels there were no differences in the trauma produced by G and nonG exposures. At Leq=90 dB(A) nonG exposures produced increased trauma relative to equivalent G exposures. By removing energy from the impulsive transients by limiting their bandwidth, trauma could be reduced. The use of noise bursts to produce the nonG noise also reduced the amount of trauma. A metric based on kurtosis and energy may be useful in modifying existing exposure criteria. [Description provided by NIOSH]
• Subjects:
  Animals Environmental Monitoring Hearing Loss Hearing Loss, Noise-Induced Laboratories Noise Occupational Health Safety
• Keywords:
  Animal-studies Exposure-assessment Exposure-levels Hearing-impairment Hearing-loss Laboratory-animals Noise-exposure Noise-induced-hearing-loss
• ISSN:
  0001-4966
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Abstract or Summary
• Place as Subject:
  New York ; OSHA Region 2
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  120
• Issue:
  5
• NIOSHTIC Number:
  nn:20034175
• Citation:
  J Acoust Soc Am 2006 Nov; 120(5)(Pt 2):3128-3129
• Contact Point Address:
  Wei Qiu, PhD, Auditory Research Laboratory, State University of New York at Plattsburgh, 101 Broad Street, Plattsburgh, New York, 12901
• Email:
  qiuw@plattsburgh.edu
• Federal Fiscal Year:
  2007
• NORA Priority Area:
  Disease and Injury: Hearing Loss
• Performing Organization:
  Plattsburgh State University
• Peer Reviewed:
  False
• Part Number:
  2
• Start Date:
  20040901
• Source Full Name:
  Journal of the Acoustical Society of America
• End Date:
  20060831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e4bdcbcc7546358dcf039b587ecf76a12f16c32688fbf072765ac9d29cc1baa0380072121297ac0109c1773cb40314f44882720550985d774538a8bde8023604
• Download URL:
  https://stacks.cdc.gov/view/cdc/189511/cdc_189511_DS1.pdf
• File Type:
  [PDF - 131.04 KB ]