Download or read book Noise Reduction of a Pneumatic Rock Drill written by Aarne Visnapuu and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Reduction of a Pneumatic Rock Drill written by Aarne Visnapuu and published by . This book was released on 1975 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise from Pneumatic Rock Drills written by John William Chester and published by . This book was released on 1964 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were made to determine the effect of the shape of a pneumatic-rock-drill exhaust muffler on its efficiency, and the origin and reduction of exit noise from the mufflers. The report describes the investigation of rock-drill noise abatement.

Download or read book Noise Abatement of Pneumatic Rock Drill written by Charles R. Summers and published by . This book was released on 1974 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Abatement of Pneumatic Rock Drill written by Charles R. Summers and published by . This book was released on 1974 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise from Pneumatic Rock Drills written by Herbert P. LeVan and published by . This book was released on 1964 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were made to determine the effect of the shape of a pneumatic-rock-drill exhaust muffler on its efficiency, and the origin and reduction of exit noise from the mufflers. The report describes the investigation of rock-drill noise abatement.

Download or read book A Practical Approach to the Exhaust Silencing of a Pneumatic Rock Drill written by Morton Gary Barth and published by . This book was released on 1972 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One-third octave spectrum analyses of the exhaust noise produced by a medium sized pneumatic rock drill were obtained during free recriprocation to determine the most troublesome bands of noise. Noise reduction techniques were then used to design exhaust mufflers which would reduce the level of the exhaust noise to an acceptable level with a minimum increase in back pressure. The prototype mufflers evaluated included an expansion chamber, a resonator, and various modified expansion chambers. One of the modified expansion chambers tested provided very good attenuation reducing the exhaust noise from 113 dBA to 87 dBA at the operator's ear position. It caused only a slight increase in the back pressure and no detrimental effect on drill performance. The resonator muffler did not provide acceptable attenuation of the exhaust noise. Muffler development progressed under the assumption that icing would not be a problem. However, the icing characteristics of the final prototype muffler were studied and a possible method to prevent icing is suggested"--Abstract, leaf ii.

Download or read book Noise from Pneumatic Rock Drills written by William C. Miller and published by . This book was released on 1963 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engineering Noise Control Measures for Pneumatic Rock Drills written by Mark Penkeith and published by . This book was released on 1993 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Report on Status and Progress of Noise Research and Control Programs in the Federal Government written by United States. Office of Noise Abatement and Control and published by . This book was released on 1975 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes reprints of reports prepared by various interagency noise research panels such as the Interagency Noise Effects Research Panel.

Download or read book Report of Investigations written by and published by . This book was released on 1989 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Control written by and published by . This book was released on 1975 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1975 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the MESA Noise Control Conference St Louis Mo November 11 12 1975 written by and published by . This book was released on 1976 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Circular written by and published by . This book was released on 1975 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Circular written by United States. Bureau of Mines and published by . This book was released on 1975 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Hydrologic Modifications on Water Quality written by and published by . This book was released on 1975 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: