A real-ear field method for the measurement of the noise attenuation of insert-type hearing protectors.
Michael-PL; Kerlin-RL; Bienvenue-GR; Prout-JH; Shampan-JI
NIOSH 1976 Jun; :1-162
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.
NIOSH-Contract; Contract-099-74-0063; Hearing-protection; Noise-levels; Personal-protective-equipment; Measurement-methods
NTIS Accession No.
DHEW (NIOSH) Publication No. 76-181; Contract-099-74-0063
National Institute for Occupational Safety and Health