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Control of Pneumatic Chipping and Grinding Noise.

Authors
Visnapuu-A; Jensen-JW
Source
NTIS#: PB 266 747 :16 pages
Link
NIOSHTIC No.
10000270
Abstract
Pneumatic chipping, scaling, and grinding can expose the tool operator to noise levels in the range 90 to 120 dba. In most chipping and scaling operations, casting reasonance is the primary source of noise, followed by air exhaust, and machine and chisel resonance. In grinding, the air-exhaust noise predominates. The Bureau of Mines has shown that noise from these operations can be reduced by up to 15 dba. Workpiece resonance was reduced by sand or other damping methods; tool resonance, by internal damping; and chisel resonance, by constrained-layer treatment. Mufflers reduced air-exhaust noise, and an acoustically treated booth was effective in containing noise around the work area without increasing operator exposure.
Publication Date
19770101
Document Type
IH; Report of Investigations
Fiscal Year
1977
NTIS Accession No.
PB-266747
NTIS Price
A03
Identifying No.
RI-8223
NIOSH Division
RORC;
Source Name
NTIS#: PB 266 747
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