New design concept for an impulse noise dosimeter.
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas. Fairfax, VA: American Industrial Hygiene Association, 2003 May; :57
Occupational and health professionals assume that if they operate noise dosimeters according to the manufacturers instructions, accurate and valid data will result. However, commercially available noise dosimeters do not perform properly in impulsive noise environments because they suffer from instrumentation limitations and lack metrics that characterize impulse noise. In this paper, a new design concept is proposed for an impulse noise dosimeter to address the current dosimeters' limited capabilities and to measure the various parameters that can appropriately be used to assess and evaluate exposures to impulse noise. The design concept is based on the accurate acquisition, storage, and analysis of the original impulse waveform. National Institute for Occupational Safety and Health researchers developed a prototype impulse/universal noise dosimeter that consisted of a Bruel&Kjaer 4136 microphone and a Panasonic Digital Audio Tape recorder. Data analysis was performed using MATLAB software routines to calculate equivalent and peak levels, time durations, kurtosis, energy, frequency, and octave band spectra. The prototype dosimeter was used to measure and calculate "impulse noise metrics" from small firearms at indoor firing ranges. The results demonstrated the capability of the new design to accurately measure impulse noise and evaluate its potential hazards to the auditory system.
Dosimetry; Noise; Noise-levels; Noise-measurement; Environmental-factors; Impulse-noise; Occupational-exposure; Auditory-system; Hazards
Disease and Injury: Hearing Loss
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas