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A Real-Ear Field Method for the Measurement of the Noise Attenuation of Insert-Type Hearing Protectors.


PB267419

Publication Date 1976
Personal Author Michael, P. L.; Kerlin, R. L.; Bienvenue, G. R.; Prout, J. H.; Shampan, J. I.
Page Count 171
Abstract A method is developed for measuring the real-ear noise attenuation of insert-type hearing protectors worn in work places. The method involves the use of a circumaural headphone set comprising a muff-type hearing protector fitted with earphone drivers, tested and used to measure noise attenuation for five models of insert-type hearing protectors. Statistical analysis show strong correlations between the attenuation data measured by the field method and standard-method procedures for all nine one-third-octave-band test signals. General recommendations of a measurement procedure are given for the field method. The method is intended primarily as a technique for documenting the variability of hearing protector performance in the work place.
Keywords
  • Protectors
  • Ears
  • Acoustic measurement
  • Attenuation
  • Noise reduction
  • Field tests
  • Earphones
  • Audiometry
  • Statistical analysis
  • Industrial hygiene
  • Ear protectors
  • Occupational safety and health
Source Agency
  • National Institute for Occupational Safety and Health
NTIS Subject Category
  • 95D - Human Factors Engineering
  • 57U - Public Health & Industrial Medicine
Corporate Authors Pennsylvania State Univ., State College. Environmental Acoustics Lab.; National Inst. for Occupational Safety and Health, Cincinnati, Ohio. Div.
Document Type Technical Report
NTIS Issue Number 197718
Contract Number
  • CDC-99-74-63
A Real-Ear Field Method for the Measurement of the Noise Attenuation of Insert-Type Hearing Protectors.
A Real-Ear Field Method for the Measurement of the Noise Attenuation of Insert-Type Hearing Protectors.
PB267419

  • Protectors
  • Ears
  • Acoustic measurement
  • Attenuation
  • Noise reduction
  • Field tests
  • Earphones
  • Audiometry
  • Statistical analysis
  • Industrial hygiene
  • Ear protectors
  • Occupational safety and health
  • National Institute for Occupational Safety and Health
  • 95D - Human Factors Engineering
  • 57U - Public Health & Industrial Medicine
  • CDC-99-74-63
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