A real-ear field method for the measurement of the noise attenuation of insert-type hearing protectors
By: P.L. Michael ... [et al.].
Contributors: National Institute for Occupational Safety and Health.
Series: DHEW publication -- no. (NIOSH) 76-181; NIOSH technical information
Publisher: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Biomedical and Behavioral Science
Place of publication: Cincinnati, OH