CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.
As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
i
i
Up-to-date Information
Up-to-Date Info: To find the latest CDC information on this topic go to: https://www.cdc.gov/coronavirus/2019-ncov/index.html
Electromagnetic noise in Itmann Mine
-
June 1974
-
Series: Mining Publications
Details:
-
Personal Author:
-
Corporate Authors:
-
Description:"Two different techniques were used to make measurements of the absolute value of electromagnetic noise in an operating coal mine, Itmann No. 3 Mine, located near Mullens, West Virginia. The electromagnetic environment created by 250-volt DC and 550- and 950-volt AC machinery in two longwall panels was measured and is reported. One technique measures noise over the entire electromagnetic spectrum of interest for brief time periods. It is recorded using broadband analog magnetic tape, and the noise data is later transformed to give spectral plots. The other technique records noise amplitudes at several discrete frequencies for a sufficient amount of time to provide amplitude probability distributions. The specific, measured results are given in a number of spectral plots and amplitude probability distribution plots." - NIOSHTIC-2
NIOSHTIC no. 10001381
-
Subjects:
-
Series:
-
Subseries:
-
Document Type:
-
Funding:
-
Genre:
-
Place as Subject:
-
CIO:
-
Topic:
-
Location:
-
Pages in Document:103 numbered pages
-
NIOSHTIC Number:nn:10001381
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: