ASTM_E_1014_-_12.pdf

Designation:E101412Standard Guide forMeasurement of Outdoor A-Weighted Sound Levels1This standard is issued under the fixed designation E1014;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.INTRODUCTIONThis is one of a series of standards on the measurement and evaluation of community noise.Othersin the series include Test Method E1503 for conducting outdoor sound measurements using a digitalstatistical analysis system,and Guide E1780 which covers measurement of sound received from anearby fixed source1.Scope1.1 This guide covers the measurement of A-weightedsound levels outdoors at specified locations or along particularsite boundaries,using a general purpose sound-level meter.1.2 Three distinct types of measurement surveys are de-scribed:1.2.1 Survey around a site boundary,1.2.2 Survey at a specified location,1.2.3 Survey to find the maximum sound level at a specifieddistance from a source.1.3 The data obtained using this guide are presented in theform of either time-average sound levels(abbreviation TAVand symbol LAT,also known as equivalent sound level orequivalent continuous sound level abbreviated LEQ and withsymbol LAeqT)or A-weighted percentile levels(symbol LX).1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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 EnvironmentalAcousticsE1503 Test Method for Conducting Outdoor Sound Mea-surements Using a Digital Statistical Sound AnalysisSystemE1780 Guide for Measuring Outdoor Sound Received froma Nearby Fixed Source2.2 ANSI Standard:3S1.4 Specification for Sound Level MetersS1.4A Specification for Sound Level MetersS1.14 Recommendations For Specifying And Testing TheSusceptibility Of Acoustical Instruments To RadiatedRadiofrequency Electromagnetic Fields,25 Mhz To 1 GhzS1.17 Microphone Windscreens-Part 1:Measurements andSpecification of Insertion Loss in Still or Slightly MovingAirS1.40 Specifications and Verification Procedures for SoundCalibratorsS1.43 Specifications for Integrating-Averaging Sound LevelMeters1This guide is under the jurisdiction of ASTM Committee E33 on Building andEnvironmentalAcoustics and is the direct responsibility of Subcommittee E33.09 onCommunity Noise.Current edition approved May 1,2012.Published June 2012.Originallyapproved in 1984.Last previous edition approved in 2008 as E101408.DOI:10.1520/E1014-12.2For 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,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.3IEC standard:4616721 Electroacoustics-Sound Level Meters-Part 1:Specifications3.Terminology3.1 DefinitionsFor definitions of acoustical barrier,impul-sive sound,measurement set and percentile levels,see Termi-nology C6345.4.Significance and Use4.1 There are numerous situations for which outdoor soundlevel data are required.These include,but are not limited to,the following:4.1.1 Documentation of sound levels before the introductionof a new sound source(for example,assessment of the impactdue to a proposed use).4.1.2 Comparison of sound levels with and without aspecific source(for example,assessment of the impact of anexisting source).4.1.3 Comparison of sound levels with criteria or regulatorylimits(for example,indication of exceedence of criteria ornon-compliance with laws).4.2 This guide provides a means for selecting measurementlocations,operating a sound level meter,documenting theconditions under which the measurements were performed,andrecording the results.4.3 This guide provides the user with information to(1)make and document the sound level measurements necessaryto quantify relatively steady or slowly varying outdoor soundlevels over a specific time period and at specific places and(2)make and document the physical observations necessary toqualify the measurements.4.4 The user is cautioned that there are many nonacousticalfactors that can strongly influence the measurement of outdoorsound levels and that this guide is not intended to supplant theexperience and judgment of experts in the field of acoustics.The guide is not applicable whe