ASTM E989-2018 Standard Classification for Determination of Single-Number Metrics for Impact Noise.pdf

1、Designation: E989 06 (Reapproved 2012)E989 18Standard Classification forDetermination of Impact Insulation Class (IIC)Single-NumberMetrics for Impact Noise1This standard is issued under the fixed designation E989; the number immediately following the designation indicates the year oforiginal adoptio

2、n 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 classification provides a method for determining a rating that can be

3、used to compare the levels of impact noisegenerated by a standard tapping machine and transmitted through different floor-ceiling assemblies.1.2 The name given to the rating is assigned by the test method that invokes this classification.1.3 This classification is applicable only to one third octave

4、 band impact noise data obtained using the standard tapping machinedescribed in Test Methods E492 and E1007.1.4 Test methods that invoke this classification include:1.4.1 Test Method E492 the single-number rating is called impact insulation class (IIC).1.4.2 Test Method E1007 the single-number ratin

5、g isratings are called fieldapparent impact insulation class (FIIC).(AIIC),impact sound rating (ISR), and normalized impact sound rating (NISR).1.4.3 Test Method E2179 the single-number rating is called the change in impact insulation class (IIC).1.5 This standard does not purport to address all of

6、the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.6 This international standard was devel

7、oped in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documen

8、ts2.1 ASTM Standards:2C634 Terminology Relating to Building and Environmental AcousticsE492 Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using theTapping MachineE1007 Test Method for Field Measurement of Tapping Machine Impact Sound Transmissio

9、n Through Floor-CeilingAssembliesand Associated Support StructuresE2179 Test Method for Laboratory Measurement of the Effectiveness of Floor Coverings in Reducing Impact SoundTransmission Through Concrete Floors1 This classification is under the jurisdiction of ASTM Committee E33 on Building and Env

10、ironmental Acoustics and is the direct responsibility of Subcommittee E33.10on Structural Acoustics and Vibration.Current edition approved Sept. 1, 2012Nov. 1, 2018. Published November 2012December 2018. Originally approved in 1984. Last previous edition approved in 20062012as E989 06.E989 06 (2012)

11、. DOI: 10.1520/E0989-06R12.10.1520/E0989-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is

12、not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropri

13、ate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 The following terms used in this classification

14、 are defined in Terminology C634.decibel soundimpact insulation classleveloctave bandsound insulationsound pressuresound pressure level4. Significance and Use4.1 The rating increases as the impact sound attenuation of the floor ceiling structure increases. The rating can be used byarchitects, builde

15、rs, and specification and code authorities for acoustical design purposes in building constructions.4.2 The rating strictly only applies to excitation by the standard tapping machine defined in Test Methods E492 and E1007. Itdoes not deal with low frequency sounds below 100 Hz that are typically gen

16、erated below lightweight joist floors when they arewalked on. Nor does it deal with the squeaking, crunching or rattling sounds that can occur in joist construction when elementsin the construction are loose and occupants walk on the floor.4.3 This classification shall only be used with one-third oc

17、tave band data.5. Basis of Classification5.1 Table 1 lists the sound pressure levels defining the shape of the reference contour, C(f), for the sixteen one-third octave bandsfrom 100 to 3150 Hz.5.2 To determine the impact insulation rating of a floor ceiling assembly, the impact sound pressure level

18、s, L(f), must first berounded to the nearest decibel (dB).5.3 The reference contour, C(f), is then fitted to the impact sound pressure levels for the specimen by adding a constant T toall values of C(f) until the sum of positive differences between the data and the fitted contour for all frequencies

19、 is less than orequal to 32 dB. Stating this criterion as a formula, gives:D 5 (f5100f53150ifposLnf! 2$Cf!1T%# (1)where the function ifpos returns the value of the expression inside the square brackets if the value is positive. If the value iszero or negative, ifpos returns zero. T is the greatest i

20、nteger for which D is less than or equal to 32.5.4 The second criterion that must be satisfied is that no value of the differences L(f) C(f) + T can be greater than 8. Tmust be increased until the difference in each frequency band is less than or equal to 8.5.5 When both criteria have been satisfied

21、, the fitted contour is given by the array C(f) + T and the rating is given by 110 T.6. Presentation of Results6.1 It is recommended that the test data be plotted in a graph together with the corresponding IIC contour obtained as describedin Section 5. In this way attention is drawn to the frequency

22、 regions that limit the impact insulation performance of the testspecimen. Fig. X1.1 shows an example of spectrum having an IIC 49.7. Keywords7.1 floors; IIC; impact noise; impact rating; tapping machineAPPENDIX(Nonmandatory Information)TABLE 1 Reference Impact Rating Contour ValuesFrequency, Hz Con

23、tour value, dB Frequency, Hz Contour value,dB100 2 630 -1125 2 800 -2160 2 1000 -3200 2 1250 -6250 2 1600 -9315 2 2000 -12400 1 2500 -15500 0 3150 -18E989 182X1. REFERENCE CONTOUR FITTED TO A MEASUREMENTFig. X1.1 shows an example of the reference contour fitted to a measurement.ASTM International ta

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25、esponsibility.This standard is subject to 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 addres

26、sed to ASTM International Headquarters. 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 th

27、e address shown below.This standard is copyrighted 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 (ph

28、one), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1Normalized impact sound pressure levels from a Test MethodE492 measurement with an IIC rating of 49. The positive differences areshown as bars at the bottom of the plot; their sum is 27. The solid line isfitted contour. The dotted line with symbols shows the measurements.FIG. X1.1 Reference Contour Fitted to a MeasurementE989 183