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Showing: 1 to 10 of 46 matches for "octave"  Page   1   2   3   4   5 TITLE A Measurement Method for Determining Absorption Coefficients for Underground Mines  SUMMARY ... Absorption coefficients are determined and presented for octave bands from 63 Hz to 8 kHz. ... Table 1: Octave-band Sound Power Levels for Calibrated Noise Source ... AUTHOR Kovalchika, Peter G. ; Matetic, Rudy J. ; Cole, Gregory P. ; Smith, Adam K. TITLE Noise in the Mining Industry--An Overview  SUMMARY ... The average spectrum for surface diesel equipment given in Figure 4 shows a maximum of noise energy in the 63 to 125 Hz octave bands with a rather rapid ... AUTHOR Marraccini, Leonard C. ; Giardino, Dennis A. PUBLISHED 1986 TITLE Rich Hill, Arizona: Historic Gold District, Modern Gold Rush  SUMMARY ... Note the visible mine tailings (white) below the Octave Mine, and the large alluvial fan (reddish) below Stanton. ... 4), the largest of which was the Octave. ... AUTHOR Melchiorre, Erik ; Lauretta, Dante ; Crombie, M. Katherine ; Gholson, Chris PUBLISHED 2003 TITLE Noise Suppression by Flexible Fan Silencers  SUMMARY ... motor only, as well as aerodynamical noise created through air interacting with the fan parts were considered to obtain decibel readings for the octave bands. ... AUTHOR Partyka, J. ; Kelly, Trevor R. J. PUBLISHED 1995 TITLE Reducing Longwall Noise With Acoustical Material On The Shields - 4 Preliminary Analysis – Preprint 97-108  SUMMARY ... octave fiequency analyzer. ... Noise levels in the test facility were measured, displayed and recorded with a real time one- third octave fiequency analyzer. ... AUTHOR Rider, J. P. ; Thimons, E. D. ; Prokop, A. D. PUBLISHED 1997 TITLE Quantitative Vibration Evaluation Of Modified Rock Drill Handles  SUMMARY ... The Interna- tional Standard IS0 5349 suggests that the acceleration can be reported either as a frequency-weighted value or ana- lyzed in 113-octave bands. ... AUTHOR De Souza, E. M. ; Moore, T. N. PUBLISHED 1992 TITLE Reduction of Environmental Noise Levels at the Meadow River No. 1 Preparation Plant  SUMMARY ... I 1 I t : I 30 -- 3 1 . 5 3 12 o * - doodoo -&o OCTAVE BAND CENTER FREQUENCES IN Hz (cps) Fig. ... Fig. 3 shows the A-weighted octave band spectra, 2 in. from the ... AUTHOR Chedgy, David G. PUBLISHED 1977 TITLE Determining Underground Roof Bolting Machine Operators Noise Exposure Using Laboratory Results  SUMMARY ... A methodology and model was developed to predict sound pressure levels at the operator position of a roof bolting machine using full-octave band frequency ... AUTHOR Matetic, R. J. ; Kovalchikb, Peter ; Colec, Gregory ; Petersond, Jeffrey ; Peng, Syd TITLE Proceedings of the Pittsburgh Meeting  SUMMARY ... George Bnrtol, . . . . LutherS.Bent, . . . Octave Chnnute, . . . Albert H. Childs, . . . Theodore Cooper, . . . Andrew Cosgriff, . . . William B. Urocker, . . ... PUBLISHED 1880 TITLE Noise Reduction Potential of a Variable Speed Driven Coal Mining Conveyor  SUMMARY ... NOISE CONTROL TREATMENTS 63 125 250 500 IK 2K 4K BK 16K ONE-THIRD OCTAVE BAN0 CENTER FREQUENCY, Hz ... ONE-THIRD OCTAVE BAND CENTER FREQUENCY, Hz ... AUTHOR Burks, J. Alton ; Bartholomae, Roy C. PUBLISHED 1992 Showing: 1 to 10 of 46 matches for "octave"  Page   1   2   3   4   5 Search Again