ASTM_F_2544_-_11.pdf

Designation:F254411An American National StandardStandard Test Method forDetermining A-Weighted Sound Power Level of CentralVacuum Power Units1This standard is issued under the fixed designation F2544;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method calculates the overall A-weightedsound power level emitted by central vacuum power units,intended for operation in domestic applications.This standardapplies to the power unit only at the power unit location.To testthe sound power level of a central vacuum at the userslocation,refer to Test Method F1334.1.2 A-weighted sound pressure measurements are per-formed on a mounted central vacuum power unit in a semi-reverberant room.This test method determines sound power bya comparison method for small noise sources,that is,compari-son to a broad band reference sound source.1.3 This test method describes a procedure for determiningthe A-weighted sound power level of small noise sources.Thistest method uses a non-special semi-reverberant room.1.4 Results are expressed as A-weighted sound power levelin decibels(referenced to 1 pW).1.5 The values stated in inch pound units are to be regardedas the standard.The values in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C634 Terminology Relating to Building and EnvironmentalAcousticsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF820 Test Method for Measuring Air Performance Charac-teristics of Central Vacuum Cleaning SystemsF1334 Test Method for Determining A-Weighted SoundPower Level of Vacuum Cleaners2.2 ANSI Standards:3S1.10 Method for the Calibration of MicrophonesS1.26 Method for the Calculation of the Absorption ofSound by the AtmosphereS1.43 Specifications for Sound Level Meters,IEC 804 andIEC 61672S12.31 Precision Methods for the Determination of SoundPower Levels of Broad Band Noise Sources in Reverber-ant RoomsS12.32 Precision Methods for Determination of SoundPower Levels for Discrete Frequency and Narrow BandNoise Sources in Reverberant RoomsS12.33 Engineering Methods for Determination of SoundPower Levels of Noise Sources in a Special ReverberantTest Room2.3 ISO Standards:3ISO 3741,3742,and 3743 are similar to and may be used inplace of ANSI S12.31,S12.32,and S12.33 respectively2.4 IEC Standard:360704.1 Test Code for the Determination ofAirborneAcous-tical Noise Emitted by Household and Similar ElectricalAppliances3.Terminology3.1 Unless otherwise indicated,definitions are in accor-dance with Terminology C634.3.2 Definitions:3.2.1 population,ntotal of all of the units of the particularmodel or type,or both,of central vacuum power units beingtested.3.2.2 population sample or sample,nthree or more units,randomly taken from the population.1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.25 on SoundMeasurement.Current edition approved Nov.1,2011.Published December 2011.Originallyapproved in 2006.Last previous edition approved in 2006 as F2544 061.DOI:10.1520/F2544-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 reference sound source,nstandard source of broad-band sound with a certified set of sound power emissions.3.2.4 source,ndevice that emits sound.3.2.5 test unit or units,nsingle central vacuum power unitof the model or type,or both,being tested.4.Significance and Use4.1 The test results enable the comparison of A-weightedsound emission from central vacuum power units when testedunder the condition of this test method.5.Test Room Requirements5.1 The test room shall be semi-reverberant.It shall containsufficiently little sound absorption material so the requirementsof 5.2 can be met.It shall be large enough to allow asemi-circle with a 6-ft radius centered at the sound source(thecentral vacuum power unit)that shall be clear of allobstruction,including the operator,during the measurements.5.1.1 The test room should be plumbed for the ce