A study of noise sources in pneumatic rock drills

Beiers J.L. (1966) A study of noise sources in pneumatic rock drills. Journal of Sound and Vibration, 3 2: .

Author Beiers J.L.
Title A study of noise sources in pneumatic rock drills
Journal name Journal of Sound and Vibration   Check publisher's open access policy
ISSN 0022-460X
Publication date 1966
Sub-type Article (original research)
Volume 3
Issue 2
Total pages 1
Subject 2200 Engineering
2210 Mechanical Engineering
Abstract The noise produced by a pneumatic percussive rock drill was studied both under field conditions and when the machine was reciprocating without load in an anechoic chamber. Sound pressure levels were measured at two standard locations, one of which corresponded to the average position for an operator's ear, where the order of importance of the individual noise sources contributing to the overall intensity was determined to be: exhaust process, mounting rattle, movement of the rifle bar, rock penetration, valve movement and the percussion action. It was possible to reduce the overall intensity of the drill noise from 117 to 98.5 dB at the ear position with a loss of approximately 45% in drilling efficiency. Analogue investigations into the percussion action between the drill piston and the drill steel shank indicated that these two impacting surfaces should be of approximately equal weight for the minimum conversion of impact energy into noise energy.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 26 Jul 2016, 04:03:16 EST by System User