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Application of a microphone phased array to identify noise sources on a roof bolting machine.

Authors
Yantek-DS; Peterson-JS; Smith-AK
Source
NOISE-CON 2007: Proceedings of the 2007 National Conference on Noise Control Engineering, Reno, Nevada, October 22-24, 2007. Burroughs C; Hambric S; Conlon S; Maling G; eds., Ames, IA: Institute of Noise Control Engineering of the USA, 2008 Feb; 3:1626-1637
Link
NIOSHTIC No.
20032795
Abstract
Exposure to excessive noise over time can cause permanent hearing loss. Workers in the mining industry are frequently exposed to A-weighted sound levels in excess of 90 dB. The A-weighted sound level at the roof bolter operator's location can exceed 100 dB while drilling. The National Institute for Occupational Safety and Health (NIOSH) measured the sound pressure at the roof bolter operator's position and utilized a phased array of microphones with beamforming software to identify noise sources on a roof bolting machine while drilling. The test data indicates the sound level at the operator's position is dominated by the 2000 Hz through 5000 Hz one-third octave-band sound levels. The beamforming results indicate that the drilling noise is primarily from two areas: the portion of the drill steel just below the rock and the drill steel-chuck interface. This paper will discuss the methods used to identify the primary noise sources.
Keywords
Mining-industry; Noise-exposure; Noise-induced-hearing-loss; Hearing-loss; Hearing-impairment; Hearing-disorders; Hearing-conservation; Coal-workers; Coal-miners; Coal-mining; Mining-equipment; Underground-mining; Underground-miners; Miners; Mine-workers; Engineering-controls; Control-technology
Contact
NIOSH, Pittsburgh Research Laboratory, 626 Cochrans Mill Road Pittsburgh, PA 15236
Publication Date
20080219
Document Type
Conference/Symposia Proceedings
Editors
Burroughs-C; Hambric-S; Conlon-S; Maling-G
Fiscal Year
2008
NTIS Accession No.
NTIS Price
ISBN No.
9781604238525
NIOSH Division
PRL
Priority Area
Mining
Source Name
NOISE-CON 2007: Proceedings of the 2007 National Conference on Noise Control Engineering, Reno, Nevada, October 22-24, 2007
State
PA; NV
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