1、Designation: E1332 10Standard Classification forDetermination of Outdoor-Indoor Transmission Class1This standard is issued under the fixed designation E1332; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis classification is part of a set of ratings for the sound isolating properties of materials, buildingelements, and structures.
3、It is based on A-weighted reduction of a transportation noise source. Otherratings include Classification E413 that rates the ability of a partition to reduce speech and othersounds within a limited frequency range, and Classification E989 that provides a rating method forcomparing the impact-insula
4、tion properties of floor-ceiling assemblies.1. Scope1.1 The purpose of this classification is to provide a single-number rating that can be used for comparing building facadedesigns, including walls, doors, windows, and combinationsthereof. This rating is designed to correlate with subjectiveimpress
5、ions of the ability of building elements to reduce theoverall loudness of ground and air transportation noise.2It isintended to be used as a rank ordering device.1.2 The rating does not necessarily relate to the perceivedaesthetic quality of the transmitted sound. Different facadeelements with simil
6、ar ratings may differ significantly in theproportion of low and high frequency sound that they transmit.It is best to use specific sound transmission loss values, inconjunction with actual spectra of outdoor and indoor soundlevels, for making final selections of facade elements.1.3 Excluded from the
7、 scope of this classification areapplications involving noise spectra differing markedly fromthose described in 4.1. Thus excluded, for example, would becertain industrial noises with high levels at frequencies belowthe 80 Hz one-third octave band, relative to levels at higherfrequencies. However, f
8、or any source with a spectrum similarto those in 4.1, this classification provides a more reliableranking of the performance of partitions and facade elementsthan do other classifications such as Classification E413.1.4 The values stated in SI units are to be regarded asstandard. No other units of m
9、easurement 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
10、limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3C634 Terminology Relating to Building and EnvironmentalAcousticsE90 Test Method for Laboratory Measurement of AirborneSound Transmission Loss of Building Partitions and Ele-mentsE413 Classification for Rating Sound InsulationE966 Gu
11、ide for Field Measurements of Airborne SoundInsulation of Building Facades and Facade ElementsE989 Classification for Determination of Impact InsulationClass (IIC)2.2 ANSI Standard:S1.4 Specifications for Sound Level Meters42.3 ISO Standard:ISO 532 AcousticsMethod for Calculating LoudnessLevel43. Te
12、rminology3.1 DefinitionsFor definitions used in this classification,see Terminology C634.4. Significance and Use4.1 This classification provides the A-weighted sound levelreduction for a test specimen, based upon the sound spectrumgiven in Table 1. The spectrum shape is an average of three1This clas
13、sification is under the jurisdiction of ASTM Committee E33 onBuilding and Environmental Acoustics and is the direct responsibility of Subcom-mittee E33.03 on Sound Transmission.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1990. Last previous edition approved in 2
14、003 as E1332 - 90 (2003).DOI: 10.1520/E1332-10.2This classification may be used in conjunction with Test Method E90 or GuideE966.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informati
15、on, refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Unit
16、ed States.typical spectra from transportation sources (aircraft takeoff,freeway, and railroad passby). A study showed that thisclassification correlated well with theA-weighted and loudnessreductions (see ISO 532) calculated for each of the typicalspectra for the one-third octave band range of 50 to
17、 5000 Hz.The calculated numeric value of OITC is based on themeasured sound transmission loss values for a particularbuilding facade and depends only on the shape of the referencesource spectrum used in the calculation. The values shown inTable 1 have an arbitrary reference level.4.2 This classifica
18、tion requires sound transmission loss (TL)measurements in one-third octave bands from 80 to 4000 Hz.Due to accuracy limitations given in Test Method E90 andGuide E966, measurements below the 100 Hz one-third octaveband are not usually reported. Studies have shown that data inthe 80 Hz one-third octa
19、ve band are necessary to obtainacceptable correlations for transportation sound sources. Forthe purposes of this classification, measurements of soundtransmission loss in the 80 Hz one-third octave band fromqualified laboratories are deemed to be of acceptable accuracy.4.3 Users of this classificati
20、on should recognize that lowfrequency measurements of sound transmission loss may beaffected by the test specimen size or the specimen edgerestraints, or both, particularly for small modular specimenssuch as doors or windows. Consequently, the outdoor-indoortransmission class (OITC) may also be affe
21、cted by thesefactors, resulting in some uncertainty of the field performanceof assemblies bearing a rating number using this classification,but to what extent is unknown.5. Basis of Classification5.1 The outdoor-indoor transmission class (OITC) of a testspecimen is calculated using its sound transmi
22、ssion loss in therange 80 to 4000 Hz, as measured in accordance with TestMethod E90 or Guide E966. These transmission loss data arethen used to determine theA-weighted sound level reduction ofthe specimen for the reference source spectrum specified inTable 1. The OITC is then equal to the calculated
23、 A-weightedsound reduction, rounded to the nearest decibel.5.2 The OITC is calculated from the following:OITC 5 100.14 2 10 * log(f10Lf2 TLf1 Af!/10!(1)where:Lf= reference source spectrum,Af= A-weighting adjustment, andTLf= specimen sound transmission loss, at each one-third-octave frequency band.5.
24、3 Table 2 and Table 3 show a worksheet for calculatingOITC. The figures in Column 3 for theA-weighting correctionsare taken from ANSI S1.4. A computer program for calculat-ing OITC, written in a common form of BASIC language, isgiven in Fig. 1.6. Report6.1 It is recommended that OITC always be prese
25、ntedtogether with a graph of the sound transmission loss measure-ments used for the calculation. The graph should follow theformat recommended in Test Method E90. A bold horizontalline should be drawn across the graph at the OITC level.6.2 The OITC shall always be accompanied by a statement,if true,
26、 that it was calculated in accordance with this classifi-cation. This statement shall also include whether Test MethodE90 or Guide E966 was used to obtain the sound transmissionloss data, and the following statement: “This rating is based onTABLE 1 Reference Source SpectrumOne-third Octave BandCente
27、r FrequencySound Level, dB80 103100 102125 101160 98200 97250 95315 94400 93500 93630 91800 901000 891250 891600 882000 882500 873150 854000 84TABLE 2 Worksheet for Calculating OITCColumn 1 Column 2 Column 3 Column 4 Column 5 Column 6BandCenterFrequency,HzReferenceSoundSpectrum,dB (Lf)A-weightingCor
28、rection,dB (Af)Column 2+Column 3SpecimenTLfColumn 4Column 580 103 22.5 80.5100 102 19.1 82.9125 101 16.1 84.9160 98 13.4 84.6200 97 10.9 86.1250 95 8.6 86.4315 94 6.6 87.4400 93 4.8 88.2500 93 3.2 89.8630 91 1.9 89.1800 90 0.8 89.21000 89 0 89.01250 89 0.6 89.61600 88 1.0 89.02000 88 1.2 89.22500 87
29、 1.3 88.33150 85 1.2 86.24000 84 1.0 85.0Total Column 4 (dBA) = 10 log ( 10(Column 4f / 10)f= 100.13 dBTotal Column 6 (dBA) = 10 log ( 10(Column 6f / 10)fOITC = 100.13 (total Column 6)where:f = each one-third-octave frequency band.E1332 102an average transportation noise source spectrum and anA-weig
30、hted sound level reduction, either of which may beinappropriate for some applications.”7. Precision7.1 A study5of forty two sound attenuating gypsum boardwall assemblies compared the calculated A-weighted soundreduction of each assembly, for three sound spectra represent-ing railroad, freeway, and a
31、ircraft noise sources over theone-third-octave band center frequency range of 50 to 4000Hz, to the calculated OITC. The study gave the followingstatistical data:Source Slope, dB Intercept, dB CorrelationStandardDeviation,dBRailroad 0.977 2.4 0.990 1.2Freeway 1.088 2.5 0.981 1.6Aircraft 1.099 2.8 0.9
32、61 2.48. Keywords8.1 A-weighting; aircraft; buildings; classification; facade;freeway; indoor; insulation; isolation; loudness; noise;outdoor-indoor transmission class (OITC); outdoor; railroad;sound; traffic; transmission; transportationASTM International takes no position respecting the validity o
33、f any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to
34、 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.
35、Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is c
36、opyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm
37、.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).5Walker, K. W., “Single Number Ratings for Sound Transmission Loss,” Soundand Vibration, Vol. 22, July 1988.TABLE 3 Sample Workshe
38、et for Calculating OITCColumn 1 Column 2 Column 3 Column 4 Column 5 Column 6BandCenterFrequency,HzReferenceSoundSpectrum,dBA-weightingCorrection,dBColumn 2+Column 3SpecimenTL,dBColumn 4Column 580 103 22.5 80.5 26 54.5100 102 19.1 82.9 26 56.9125 101 16.1 84.9 29 55.9160 98 13.4 84.6 29 55.6200 97 10
39、.9 86.1 31 55.1250 95 8.6 86.4 32 54.4315 94 6.6 87.4 32 55.4400 93 4.8 88.2 30 58.2500 93 3.2 89.8 32 57.8630 91 1.9 89.1 36 53.1800 90 0.8 89.2 40 49.21000 89 0 89.0 44 45.01250 89 0.6 89.6 46 43.61600 88 1.0 89.0 48 41.02000 88 1.2 89.2 49 40.22500 87 1.3 88.3 47 41.33150 85 1.2 86.2 46 40.24000 84 1.0 85.0 50 35.0Total Column 4 (dBA) = 10 log ( 10(Column 4f / 10)f= 100.13 dBTotal Column 6 (dBA) = 10 log ( 10(Column 6f / 10)fOITC = 100.13 (total Column 6)= 100.13 66.15=34FIG. 1 Computer Program to Calculate OITCE1332 103
