1、Designation: E989 06 (Reapproved 2012)Standard Classification forDetermination of Impact Insulation Class (IIC)1This standard is issued under the fixed designation E989; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast 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 arating that can be used to compare the levels of impact noisegen
3、erated by a standard tapping machine and transmittedthrough different floor-ceiling assemblies.1.2 The name given to the rating is assigned by the testmethod that invokes this classification.1.3 This classification is applicable only to one third octaveband impact noise data obtained using the stand
4、ard tappingmachine described 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 iscalled impact insulation class (IIC).1.4.2 Test Method E1007 the single-number rating iscalled field impact insulation class (FIIC).1
5、.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 Do
6、cuments2.1 ASTM Standards:2C634 Terminology Relating to Building and EnvironmentalAcousticsE492 Test Method for Laboratory Measurement of ImpactSound Transmission Through Floor-Ceiling AssembliesUsing the Tapping MachineE1007 Test Method for Field Measurement of TappingMachine Impact Sound Transmiss
7、ion Through Floor-Ceiling Assemblies and Associated Support Structures3. Terminology3.1 The following terms used in this classification aredefined in Terminology C634.decibel soundimpact insulation classleveloctave bandsound insulationsound pressuresound pressure level4. Significance and Use4.1 The
8、rating increases as the impact sound attenuation ofthe floor ceiling structure increases. The rating can be used byarchitects, builders, and specification and code authorities foracoustical design purposes in building constructions.4.2 The rating strictly only applies to excitation by thestandard ta
9、pping machine defined in Test Methods E492 andE1007. It does not deal with low frequency sounds below 100Hz that are typically generated below lightweight joist floorswhen they are walked on. Nor does it deal with the squeaking,crunching or rattling sounds that can occur in joist constructionwhen el
10、ements in the construction are loose and occupantswalk on the floor.4.3 This classification shall only be used with one-thirdoctave band data.5. Basis of Classification5.1 Table 1 lists the sound pressure levels defining the shapeof the reference contour, C(f), for the sixteen one-third octavebands
11、from 100 to 3150 Hz.5.2 To determine the impact insulation rating of a floorceiling assembly, the impact sound pressure levels, L(f), mustfirst be rounded to the nearest decibel (dB).5.3 The reference contour, C(f), is then fitted to the impactsound pressure levels for the specimen by adding a const
12、ant Tto all values of C(f) until the sum of positive differencesbetween the data and the fitted contour for all frequencies isless than or equal 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 expressioninsi
13、de the square brackets if the value is positive. If the1This classification 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 Sept. 1, 2012. Published November
14、 2012. Originallyapproved in 1984. Last previous edition approved in 2006 as E989 06. DOI:10.1520/E0989-06R12.2For 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 st
15、andards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1value is zero or negative, ifpos returns zero. T is the greatestinteger for which D is less than or equal to 32.5.4 The second criterion
16、that must be satisfied is that novalue of the differences L(f) C(f) + T can be greater than8. T must be increased until the difference in each frequencyband is less than or equal to 8.5.5 When both criteria have been satisfied, the fitted contouris given by the array C(f) + T and the rating is given
17、 by 110 T.6. Presentation of Results6.1 It is recommended that the test data be plotted in a graphtogether with the corresponding IIC contour obtained asdescribed in Section 5. In this way attention is drawn to thefrequency regions that limit the impact insulation performanceof the test specimen. Fi
18、g. X1.1 shows an example of spectrumhaving an IIC 49.7. Keywords7.1 floors; IIC; impact noise; impact rating; tapping ma-chineAPPENDIX(Nonmandatory Information)X1. REFERENCE CONTOUR FITTED TO A MEASUREMENTFig. X1.1 shows an example of the reference contour fittedto a measurement.TABLE 1 Reference Im
19、pact Rating Contour ValuesFrequency, Hz Contour 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 -18NOTE 1Normalized impact sound pressure levels from a Test MethodE492 measurement with an IIC rating of 49.
20、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 06 (2012)2ASTM International takes no position respecting the validity of
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23、our 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 co
24、pyrighted 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.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/).E989 06 (2012)3
