Test apparatus for measuring sound power levels of drills.
Aljoe-WW; Stein-RR; Bartholomae-RC
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9166, 1987 Jan; :1-35
This Bureau of Mines report describes in detail the design and operation of a test apparatus for measuring the sound power levels of drills used by the mining industry. The two major components of the test apparatus are a computer-controlled automated drill test fixture (ADTF) and a 45,000-ft3 reverberation chamber that houses the ADTF. Design specifications and performance capabilities of the ADTF and the reverberation room are given. Initial test results for three types of drills-a pneumatic percussion drill, a hydraulic percussion drill, and a pneumatic rotary drill-are given to illustrate the types of experiments that can be conducted with the test apparatus.
Mining-industry; Mining-equipment; Noise-levels; Noise-sources; Power-tools; Pneumatic-tools; Coal-mining; Noise; Noise-analysis
IH; Information Circular
NTIS Accession No.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9166