1、Designation: E 413 04Classification forRating Sound Insulation1This standard is issued under the fixed designation E 413; 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
2、the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This classification covers methods of calculating single-number acoustical ratings fo
3、r laboratory and field measure-ments of sound attenuation obtained in one-third octave bands.1.2 The name given to the single-number rating is assignedby the test method that invokes this classification.1.3 Test methods that invoke this classification include:1.3.1 Test Method E 90The single-number
4、rating is calledsound transmission class (STC).1.3.2 Test Method E 336Single-number ratings are fieldsound transmission class (FSTC), noise isolation class (NIC),and normalized noise isolation class (NNIC).1.3.3 Test Method E 596The single-number rating iscalled noise isolation class (NIC).1.3.4 Tes
5、t Method E 1414The single-number rating iscalled ceiling attenuation class (CAC).2. Referenced Documents2.1 ASTM Standards:2C 634 Terminology Relating to Environmental AcousticsE 90 Test Method for Laboratory Measurement of AirborneSound Transmission Loss of Building Partitions and Ele-mentsE 336 Te
6、st Method for Measurement of Airborne SoundInsulation in BuildingsE 596 Test Method for Laboratory Measurement of NoiseReduction of Sound-Isolating EnclosuresE 1332 Classification for Determination of Outdoor-IndoorTransmission ClassE 1414 Test Method for Airborne Sound Attenuation Be-tween Rooms Sh
7、aring a Common Ceiling Plenum2.2 ISO Standard:3ISO 717 Rating of Sound Insulation for Dwellings3. Terminology3.1 The following terms used in this classification aredefined in Terminology C 634:airborne sound,field sound transmission class,level,noise isolation class,noise reduction,normalized noise
8、isolation class,one-third octave band,sound insulation,sound isolation, andsound transmission loss.4. Significance and Use4.1 These single-number ratings correlate in a general waywith subjective impressions of sound transmission for speech,radio, television, and similar sources of noise in offices
9、andbuildings. This classification method is not appropriate forsound sources with spectra significantly different from thosesources listed above. Such sources include machinery, indus-trial processes, bowling allies, power transformers, musicalinstruments, many music systems, and transportation nois
10、essuch as motor vehicles, aircraft and trains. For these sources,accurate assessment of sound transmission requires a detailedanalysis in frequency bands. A single-number sound transmis-sion rating for building faade elements is given in Classifica-tion E 1332.4.2 The single-number ratings obtained
11、can be used tocompare the potential sound insulation of partitions or floorstested in laboratory conditions (STC) or the actual soundisolation between different suites in buildings (NNIC, NIC).The rating for a partition built and tested in a building may belower than that obtained for a partition te
12、sted in a laboratorybecause of flanking transmission or construction errors.1This classification is under the jurisdiction of ASTM Committee E33 onEnvironmental Acoustics and is the direct responsibility of Subcommittee E33.03 onSound Transmission.Current edition approved April 1, 2004. Published Ma
13、y 2004. Originallyapproved in 1970. Last previous edition approved in 1999 as E 413 87 (1999).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
14、 Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1A similar rating procedure, described i
15、n ISO 717, providessingle figure sound insulation ratings with a frequency range that extendsfrom 100 to 3150 Hz with no maximum deficiency specified at individualfrequencies. For most partitions, the two ratings differ by only one or twopoints.5. Procedure5.1 The reference contour is defined by the
16、 array of valuesgiven in Table 1.5.2 Round the data to which the contour is to be fitted to thenearest integer.NOTE 2The contour in Table 1 has a rating of zero. Other contoursmay be derived by adding the same integer to all values in the table.5.3 Fit the reference contour to the data by increasing
17、simultaneously all the values in Table 1 in 1-dB incrementsuntil some of the data are less than the shifted referencecontour.5.4 At each frequency calculate the difference between theshifted reference value and the data. If a measured data point isless than the reference contour this is a deficiency
18、; onlydeficiencies are counted in the fitting procedure. Continue toincrease the reference contour values to the highest level thatwill satisfy the following conditions:5.4.1 The sum of the deficiencies is less than or equal to 32dB; and5.4.2 The maximum deficiency at any one frequency doesnot excee
19、d 8 dB.5.5 The single-number rating is given by the value of theshifted reference contour at 500 Hz.6. Presentation of Results6.1 It is recommended that the data be plotted to the scalesizes recommended in Note 3, along with the shifted referencecontour (see Figs. X1.1 and X1.2). This type of presen
20、tationdraws attention to the frequency regions of the data that limitthe single-number rating.NOTE 3Recommended graph scale sizes are 2 mm/dB for the ordinateand 50 mm per 10 to 1 frequency ratio for the logarithmic abscissa. Theordinate scale should start at 0 dB. If larger or smaller scale sizes a
21、reunavoidable, the same aspect ratio of 25 dB per 10 to 1 frequency ratioshould be retained.7. Keywords7.1 architectural acoustics; building design; ceiling attenu-ation class (CAC); field sound transmission class (FSTC);noise isolation class (NIC); normalized noise isolation class(NNIC); partitions
22、 (buildings); sound insulation rating; soundtransmission class (STC)APPENDIX(Nonmandatory Information)X1. EXAMPLES OF FITTED CONTOURSX1.1 Figs. X1.1 and X1.2 show examples of transmissionloss data fitted to the reference contour. In Fig. X1.1, the STCis 24 and the 8-dB limitation in 5.4.2 is not inv
23、oked. In Fig.X1.2 the STC is 30 and the 8-dB limitation is invoked at 2500Hz.TABLE 1 Reference Sound Insulation Contour for Calculation ofSingle-Number RatingsFrequency, Hz 125 160 200 250 315 400 500 630Value, dB 16 13 10 7 4 1 0 1Frequency, Hz 800 1000 1250 1600 2000 2500 3150 4000Value, dB 2 3 4
24、44444E413042NOTEThe deficiencies are shown as bars at the bottom of the chart.The 8-dB limitation is not invoked.FIG. X1.1 Reference Contour (Solid Line) Fitted to TransmissionLoss Data (Symbols + Line)E413043ASTM International takes no position respecting the validity of any patent rights asserted
25、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 revision at any time by the
26、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. Your comments will receive ca
27、reful 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 ASTM Internatio
28、nal, 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).NOTEThe deficiencies are shown as bars at the bottom of the chart.The 8-dB limitation is invoked at 2500 Hz.FIG. X1.2 Reference Contour (Solid Line) Fitted To TransmissionLoss Data (Symbols + Line)E413044
