Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Aspects of Noise Generation and Hearing Protection in Underground Coal Mines.

Authors
Anonymous
Source
NTIS: PB/219-087/4 Available for Reference At Bureau Libraries :158 pages
Link
NIOSHTIC No.
10000193
Abstract
Roof warning signals from 11 underground coal mines (principally in the Pittsburgh seam) were studied and analyzed. The character of individual acoustic warning signals is shown to be dependent on spectral distribution of energy. Reverberation times (pulse decay rates) were found to be usually between 0.1 and 0.5 Seconds. Listening tests were conducted to assess the miner's ability to discriminate speech and roof talk signals in noise and in quiet, with and without ear protectors, and with various levels of hearing loss. The ability to detect roof talk is shown to be generally degraded while wearing ear protection in quiet, although, if ear protectors are worn only when required by high noise levels, the ability to detect roof talk will be preserved at its maximum.
Publication Date
19720101
Document Type
CP; Final Contract Report;
Fiscal Year
1972
NTIS Accession No.
PB-219087/4
NTIS Price
A09
Identifying No.
OFR 19-73
NIOSH Division
PRC;
Source Name
NTIS: PB/219-087/4; Available for Reference At Bureau Libraries
State
PA;
Performing Organization
Pennsylvania State University
TOP