Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Limitations of using dosimeters in impulse noise environments.

Authors
Kardous-CA; Willson-RD
Source
J Occup Environ Hyg 2004 Jul; 1(7):456-462
NIOSHTIC No.
20025098
Abstract
The National Institute for Occupational Safety and Health (NIOSH) investigated the capabilities of noise dosimeters to measure personal exposure to impulse noise. The two leading types of commercially available dosimeters were evaluated in terms of their ability to measure and integrate impulses generated from gunfire during live-fire exercises at a law enforcement indoor firing range. Sound measurements were conducted throughout the firing range using dosimeters, sound level meters, and a measurement configuration that consisted of a quarter-inch microphone and a digital audiotape recorder to capture the impulse waveforms. Personal dosimetry was conducted on eight shooters, an observer, and the range master. Peak levels from gunfire reached 163 decibels (dB), exceeding the nominal input limit of the dosimeters. The dosimeters "clipped" the impulses by acting as if the gunfire had a maximum level of 146 dB. In other cases, however, peak levels (e.g., 108 dB) were below the dosimeter input limits, but the dosimeters still showed a peak level of 146 dB. Although NIOSH recommends that sound levels from 80 to 140 dB (A-weighted) be integrated in the calculation of dose and the time-weighted average, our present data suggest this criterion may be inadequate. These results showed that some instruments are incapable of providing accurate measures of impulse sounds because of their electroacoustic limitations.
Keywords
Dosimetry; Impulse-noise; Noise; Noise-measurement; Noise-exposure; Law-enforcement; Sound; Sound-analyzers; Exposure-assessment; Exposure-levels; Exposure-limits; Measurement-equipment; Risk-factors
Contact
National Institute for Occupational Safety and Health, Hearing Loss Prevention Section, Mail Stop C-27, 4676 Columbia Parkway, Cincinnati, OH 45226-1998
CODEN
JOEHA2
Publication Date
20040701
Document Type
Journal Article
Email Address
ckardous@cdc.gov
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Issue of Publication
7
ISSN
1545-9624
NIOSH Division
DART
Priority Area
Disease and Injury: Hearing Loss
Source Name
Journal of Occupational and Environmental Hygiene
State
OH
TOP