Noise Reduction of a Pneumatic Rock Drill PDF Download
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Author: Aarne Visnapuu
Publisher:
ISBN:
Category : Jackhammers
Languages : en
Pages : 32
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Book Description
Author: Aarne Visnapuu
Publisher:
ISBN:
Category : Jackhammers
Languages : en
Pages : 32
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Book Description
Author: Aarne Visnapuu
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
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Book Description
Author: John William Chester
Publisher:
ISBN:
Category : Noise control
Languages : en
Pages : 20
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Book Description
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.
Author: Charles R. Summers
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 58
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Book Description
Author: Charles R. Summers
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
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Book Description
Author: Herbert P. LeVan
Publisher:
ISBN:
Category : Electro-osmosis
Languages : en
Pages : 18
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Book Description
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.
Author: Morton Gary Barth
Publisher:
ISBN:
Category : Pneumatic machinery
Languages : en
Pages : 318
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Book Description
"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.
Author: William C. Miller
Publisher:
ISBN:
Category : Drilling and boring machinery
Languages : en
Pages : 38
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Author: Mark Penkeith
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 74
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Book Description
Author: United States. Office of Noise Abatement and Control
Publisher:
ISBN:
Category : Noise control
Languages : en
Pages : 912
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Book Description
Includes reprints of reports prepared by various interagency noise research panels such as the Interagency Noise Effects Research Panel.
