1、Designation: E 1332 90 (Reapproved 2003)Standard Classification forDetermination of Outdoor-Indoor Transmission Class1This standard is issued under the fixed designation E 1332; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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, buildingeleme
3、nts, and structures. It is based on A-weighted reduction of a transportation noise source. Otherratings include Classification E 413 that rates the ability of a partition to reduce speech and othersounds within a limited frequency range, and Classification E 989 that provides a rating method forcomp
4、aring the impact-insulation 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
5、 with subjectiveimpressions 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 fa
6、cadeelements with similar 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 element
7、s.1.3 Excluded from the 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 higher
8、frequencies. However, for 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 E 413.1.4 This standard does not purport to address all of thesafe
9、ty 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:C 634 Terminology Relating to Env
10、ironmental Acoustics3E 90 Test Method for Laboratory Measurement ofAirborne-Sound Transmission Loss of Building Partitionsand Elements3E 413 Classification for Rating Sound Insulation3E 966 Guide for Field Measurement of Airborne SoundInsulation of Building Facades and Facade Elements3E 989 Classifi
11、cation for Determination of Impact InsulationClass (IIC)32.2 ANSI Standard:S1.4 Specifications for Sound Level Meters42.3 ISO Standard:ISO 532 AcousticsMethod for Calculating LoudnessLevel43. Terminology3.1 DefinitionsFor definitions used in this classification,see Terminology C 634.4. Significance
12、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 threetypical spectra from transportation sources (aircraft takeoff,freeway, and railroad passby). A study showed that th
13、isclassification correlated well with the A-weighted and loudnessreductions (see ISO 532) calculated for each of the typicalspectra for the one-third octave band range of 50 to 5000 Hz.The calculated numeric value of OITC is based on themeasured sound transmission loss values for a particular1This c
14、lassification is under the jurisdiction of ASTM Committee E33 onEnvironmental Acoustics and is the direct responsibility of Subcommittee E33.03 onSound Transmission.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1990. Last previous edition approved in 1998 as E
15、1332 - 90 (1998).2This classification may be used in conjunction with Test Method E 90 or GuideE 966.3Annual Book of ASTM Standards, Vol 04.06.4Available from American National Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO
16、Box C700, West Conshohocken, PA 19428-2959, United States.building 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 classification requires sound transmission loss (TL)measurements in o
17、ne-third octave bands from 80 to 4000 Hz.Due to accuracy limitations given in Test Method E 90 andGuide E 966, measurements below the 100 Hz one-third octaveband are not usually reported. Studies have shown that data inthe 80 Hz one-third octave band are necessary to obtainacceptable correlations fo
18、r 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 classification should recognize that lowfrequency measurements of sou
19、nd 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 affected by thesefactors, resulting in some uncertainty of th
20、e 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 transmission loss in therange 80 to 4000 Hz, as measured in acco
21、rdance with TestMethod E 90 or Guide E 966. These transmission loss data arethen used to determine the A-weighted sound level reduction ofthe specimen for the reference source spectrum specified inTable 1. The OITC is then equal to the calculated A-weightedsound reduction, rounded to the nearest dec
22、ibel.5.2 The OITC is calculated from the following:OITC 5 100.14 2 10 * log(f10Lf2 TLf1 Af!/10!dB (1)where:Lf= reference source spectrum,Af= A-weighting adjustment, andTLf= specimen sound transmission loss, at each one-third-octave frequency band.5.3 Table 2 and Table 3 show a worksheet for calculat
23、ingOITC. The figures in Column 3 for the A-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 presentedtogether with a graph of the sound transmissio
24、n loss measure-ments used for the calculation. The graph should follow theformat recommended in Test Method E 90. 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, that it was calculated in accordance with this c
25、lassifi-cation. This statement shall also include whether Test MethodE 90 or Guide E 966 was used to obtain the sound transmissionloss data, and the following statement: “This rating is based onan average transportation noise source spectrum and anA-weighted sound level reduction, either of which ma
26、y 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 aircraft noise sources over theone-third-octave
27、 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 0.961 2.48. Keywords8.1 A-weighting; aircraft; bu
28、ildings; classification; facade;freeway; indoor; insulation; isolation; loudness; noise;outdoor-indoor transmission class (OITC); outdoor; railroad;sound; traffic; transmission; transportation5Walker, K. W., “Single Number Ratings for Sound Transmission Loss,” Soundand Vibration, Vol. 22, July 1988.
29、TABLE 1 Reference Source SpectrumOne-third Octave BandCenter FrequencySound Level, dB80 103100 102125 101160 98200 97250 95315 94400 93500 93630 91800 901000 891250 891600 882000 882500 873150 854000 84E 1332 90 (2003)2TABLE 2 Worksheet for Calculating OITCColumn 1 Column 2 Column 3 Column 4 Column
30、5 Column 6BandCenterFrequency,HzReferenceSoundSpectrum,dB (Lf)A-weightingCorrection,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
31、.8 89.21000 89 0 89.01250 89 0.6 89.61600 88 1.0 89.02000 88 1.2 89.22500 87 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 frequenc
32、y band.TABLE 3 Sample Worksheet 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
33、98 13.4 84.6 29 55.6200 97 10.9 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 41.3
34、3150 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=34E 1332 90 (2003)3ASTM International takes no position respecting the validity of any patent
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37、 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 copyrighted by
38、 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.org (e-mail); or through the ASTM website(www.astm.org).FIG. 1 Computer Program to Calculate OITCE 1332 90 (2003)4
