Record Display for the EPA National Library Catalog

RECORD NUMBER: 16 OF 20

OLS Field Name OLS Field Data
Main Title Procedures for estimating sound power from measurements of sound pressure : an experimental investigation with application to noise from portable air compressors /
Author Holmer, Curtis I.
CORP Author National Bureau of Standards, Washington, D.C. Applied Acoustics Section.;Environmental Protection Agency, Washington, D.C. Office of Noise Abatement and Control.
Publisher National Bureau of Standards ; [Dept. of Commerce, NTIS],
Year Published 1975
Report Number EPA-550/8-76-001; NBSIR-75-652; NBS-2130152
Stock Number COM-75-11399/3
OCLC Number 20317421
Subjects Sound pressure--Measurement. ; Noise control.
Additional Subjects Compressor noise ; Power spectra ; Sound pressure ; Noise(Sound) ; Pollution ; Measurement ; Air compressors ; Tests ; Noise pollution ; Sound power
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101Y4HE.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJAD  EPA 550/8-76-001 Region 3 Library/Philadelphia, PA 11/30/1990
EJBD ARCHIVE EPA 550-8-76-001 Headquarters Library/Washington,DC 06/17/2013
EKAM  TD893.H6 1975 Region 4 Library/Atlanta,GA 12/19/1997
ESAD  EPA 550-8-76-001 Region 10 Library/Seattle,WA 03/23/2010
NTIS  COM-75-11399/3 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 73 pages.
Abstract
The report describes investigations of the accuracy and precision of various measurement methodologies for determining the estimated sound power output of 'large' machines in the free field over a reflecting plane. One purpose of this investigation is to place empirical error bounds on many of the free field measurement procedures currently proposed or in use; and in particular, compare the results of near-field and far-field measurements. The sources used for the investigation included 17 portable air compressors of various types (powered by internal combustion engines), a reference sound source, and a loudspeaker driven by a pure tone source. The data recorded include sound pressure level (A-weighted, linear, and 1/3-octave band) on an 84 point hemispherical array of seven metre radius, and near-field measurements, sampled every square metre, on a rectangular surface one metre from the machine surface. These data were reduced to provide information on the deviation of near-field sound power determinations from far-field power level (using subsets of the data as appropriate to various methodologies).
Notes
"COM-75-11399." "Final report." Prepared for Office of Noise Abatement and Control, U.S. Environmental Protection Agency, Washington, D.C. 20460. Includes bibliographical references.