Analysis of Impact/Impulse Noise for Predicting Noise-Induced Hearing Loss

Details

• Personal Author:
  Flamm AM ; Prince, Mary M. ; Vipperman JS
• Description:
  Studies indicate that the statistical properties and temporal structure of the sound signal are important in determining the extent of hearing hazard. As part of a pilot study to examine hearing conservation program effectiveness, NIOSH collected noise samples of impact noise sources in an automobile stamping plant, focusing on jobs with peak sound levels (L1>k) of greater than 120 dB. Digital tape recordings of sounds were collected using a Type I Precision Sound Level Meter and microphone connected to a DAT tape recorder. The events were archived and processed as .wav files to extract single events of interest on CD-R media and CD audio media. A preliminary analysis of sample wavelet files was conducted to characterize each event using metrics such as the number of impulses per unit lime. the repetition rate or temporal pattern of these impulses, index of peakedness, crest factor. kurtosis, coefficient of kurtosis, rise time, fall time, and peak time. The spectrum, duration, and inverse of duration for each waveform were also computed. Finally, the data were evaluated with the Auditory Hazard Assessment Algorithm (AHAAH). Improvements to data collection for a future study examining different strategies for evaluating industrial noise exposure will be discussed. [Description provided by NIOSH]
• Subjects:
  Hearing Hearing Loss Hearing Loss, Noise-Induced Noise Noise, Occupational Occupational Health Safety
• Keywords:
  Hearing-conservation Hearing-loss Impact-noise Impulse-noise Noise-analysis Noise-induced-hearing-loss Ototoxicity Standards
• ISSN:
  0001-4966
• Document Type:
  Text
• Genre:
  Abstract or Summary
• Place as Subject:
  Ohio ; OSHA Region 3 ; OSHA Region 4 ; OSHA Region 5 ; Pennsylvania ; Tennessee
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  113
• Issue:
  4
• NIOSHTIC Number:
  nn:20024107
• Citation:
  J Acoust Soc Am 2003 Apr; 113(4)(Pt 2):2196
• Contact Point Address:
  NIOSH, 4676 Columbia Parkway, R-16, Cincinnati, OH 45226
• Federal Fiscal Year:
  2003
• NORA Priority Area:
  Disease and Injury: Hearing Loss
• Peer Reviewed:
  False
• Part Number:
  2
• Source Full Name:
  Journal of the Acoustical Society of America. Proceedings of the 145th Meeting: Acoustical Society of America, Nashville, TN, April 28-May 2, 2003
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:73c1b9b5c70f38073aa3c8d867e57928d5959f079438e318094cad94abf7f5a2119aca44fa4f96560f755e53c1aeef96762765eb30655082f9e9cccc2ed3e698
• Download URL:
  https://stacks.cdc.gov/view/cdc/196086/cdc_196086_DS1.pdf
• File Type:
  [PDF - 186.49 KB ]