National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Measuring the Sound Power Level of Percussion Drills.

PB95147526

Publication Date	1994
Personal Author	Stein, R. R.
Page Count	16
Abstract	Occupational noise caused by the rock drills used in mining was investigated by the U.S. Bureau of Mines. Using a large reverberation chamber and an automated drill test fixture (ADTF), the sound power levels of mining drills were measured to determine if there are types of drills that are advantageous from a noise production standpoint. Test results show that while there are not large variations among types of drills, there are still some choices that could produce a positive effect on overall noise exposure. It is also shown that lower noise exposures are possible using larger drills because of higher production rates and better operator positioning.
Keywords	Rock drilling Percussive drills Sound pressure Noise pollution Acoustic measurement Noise reduction Underground mining Sound intensity Coal mining Occupational safety
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68B - Noise Pollution & Control
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	See also PB88-231915.
Document Type	Technical Report
Title Note	Rept. of investigations/1994.
NTIS Issue Number	199506

Measuring the Sound Power Level of Percussion Drills.

Measuring the Sound Power Level of Percussion Drills.
PB95147526

Publication Date	1994
Personal Author	Stein, R. R.
Page Count	16
Abstract	Occupational noise caused by the rock drills used in mining was investigated by the U.S. Bureau of Mines. Using a large reverberation chamber and an automated drill test fixture (ADTF), the sound power levels of mining drills were measured to determine if there are types of drills that are advantageous from a noise production standpoint. Test results show that while there are not large variations among types of drills, there are still some choices that could produce a positive effect on overall noise exposure. It is also shown that lower noise exposures are possible using larger drills because of higher production rates and better operator positioning.
Keywords	Rock drilling Percussive drills Sound pressure Noise pollution Acoustic measurement Noise reduction Underground mining Sound intensity Coal mining Occupational safety
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68B - Noise Pollution & Control
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	See also PB88-231915.
Document Type	Technical Report
Title Note	Rept. of investigations/1994.
NTIS Issue Number	199506