1、Designation: E 1289 97 (Reapproved 2003)Standard Specification forReference Specimen for Sound Transmission Loss1This standard is issued under the fixed designation E 1289; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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.1. Scope1.1 This specification describes the construction and instal-lation of a standard reference specimen for quality contro
3、l oflaboratory sound transmission loss measurements using TestMethod E 90. Test Method E 90 allows a significant latitude inthe construction and operation of a test facility. It is theobjective of standard measurement procedures that the prop-erty of a reference specimen being measured have the same
4、value in all facilities.1.2 This specification addresses the need for a referencespecimen for sound transmission loss facilities where measure-ments are made according to Test Method E 90. It describes indetail how the specimen is to be constructed and installed in atest opening.1.3 The values state
5、d in SI units are to be regarded asstandard. The values in parentheses are provided for informa-tion only.2. Referenced Documents2.1 ASTM Standards:C 634 Terminology Relating to Environmental Acoustics2E 90 Test Method for Laboratory Measurement ofAirborne-Sound Transmission Loss of Building Partiti
6、ons23. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, see Terminology C 634.4. Construction of Reference Specimen4.1 General:4.1.1 The reference specimen is composed of framed steelpanels. The required materials for fabrication and installationare as follows:Galvaniz
7、ed steel sheetswidth, 1200 mm (4 ft); thickness, 0.62 mm (0.024 in.or 24 gauge). Check weight for compliance with limits given in 4.2.1.Steel right angles with 25-mm (1-in.) flangesthickness, 3.2 mm (0.125 in.).Blind rivetsdiameter, 3 mm (0.125 in.).Duct tape, 50 mm (2 in.) wide.Drywall screws, Type
8、 Wlength, 31.8 mm (1.25 in.).Bolts (1024 by 1 in.)25 mm long with appropriate nuts and washers.Fasteners, to hold wood frame to the perimeter of the test opening.Caulking, non-hardening.Wood framing, approximately 40 mm by 90 mm (2 by 4 in. nominal) in widthand thickness.NOTE 1The quantity and lengt
9、h of each component needed dependson the size of the laboratory test opening.4.1.2 The weight of each component of the referencespecimen and the assembled specimen shall be measured andkept on record. In addition, the thickness of each of the steelpanels shall be measured in six locations. (See Appe
10、ndix X1.)4.2 Assembly:4.2.1 SheetsThe 1200-mm (4-ft nominal)-wide rectangu-lar galvanized sheets shall be 24 gauge, 0.62 mm (0.024 in.)thick. The weight of the sheets shall be 5.1 6 0.7 kg/m2(1.056 0.15 lb/ft2). The length of each sheet shall be a fewmillimeters less than the height of the laborator
11、y test opening.The total width of all the sheets shall be a few millimeters lessthan the width of the test opening. This may require that onesheet be cut lengthwise. The intent is that when installed, thepanels fill the test opening completely.4.2.2 FrameCut steel right angles to size to form a fram
12、efor each sheet; the frame shall have the same outside dimen-sions as the sheets. Notch and weld the steel angles to form thefour corners of the frame as shown in Fig. 1. Alternatively,miter the angles and weld similarly. Smooth corners afterwelding.4.2.3 PanelsConstruct a panel by riveting steel sh
13、eets tothe frames.4.2.3.1 Drill holes at 100 mm (4 in.) on-center around theperimeter of the sheets for the installation of the blind rivets. Toassure proper alignment of the sheets with the frame, it isrecommended to drill a few holes and then install rivets to holdthe sheet in place. Once this is
14、done, the remaining holes maybe drilled and the rivets installed. Position these holes to avoidconflict with the clearance holes described in 4.2.3.2.4.2.3.2 Drill 4 mm (0.16 in.) diameter holes through hori-zontal members of the frame and sheet as shown in Figs. 2 and3. These are clearance holes fo
15、r the drywall screws used toattach the panel to the wood plate (see 5.5).4.2.3.3 Drill 6.4 mm (0.25 in.) diameter holes at 400 mm(16 in.) on-center through the vertical flanges of the steelframe. These are clearance holes for the bolts used to connect1This specification is under the jurisdiction of
16、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 1989. Last previous edition approved in 1997 as E 1289 97.2Annual Book of ASTM Standards, Vol
17、 04.06.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.the panels together (see 5.4). The holes in adjacent verticalmembers should be carefully aligned with each other to easeinstallation of the panels.5. Installation5.1 Using approx
18、imately 40 mm by 90 mm wood studs(nominal 2 in. by 4 in.), install a wood frame around theperimeter of the laboratory opening. Use a double bead ofcaulking between the wood frame and the surface of thelaboratory opening. Use suitable fasteners no more than 300mm (11.8 in.) on-center.5.2 Place the re
19、ference specimen against the wood framewith the flanges of the panel frames as shown in Fig. 4.5.3 Insert 25-mm (1-in.) long No. 10-24 bolts or equivalentthrough the holes in adjacent vertical flanges drilled accordingto 4.2.3.3. Washers may be used if desired. Tighten nut snuglyto close the gap bet
20、ween adjacent panels.5.4 Fasten the test panels to the wood frame with Type Wdrywall screws 31.8-mm (1.25-in.) long inserted through theholes drilled according to 4.2.3.2.5.5 Seal the test panel joints on both sides with a singlelayer of 50-mm (2-in.) wide duct tape (centered on the joints).5.6 Seal
21、 the perimeter joint on both sides with a single layerof 50-mm (2-in.) wide duct tape (centered on the joints) asshown in Fig. 4.6. Measurements6.1 Conduct a sound transmission loss test in accordancewith Test Method E 90.6.2 The test results may be compared to the values given inTable 1, which were
22、 determined in a six-laboratory round robinevaluation conducted from 1983 to 1985. They may also becompared with theoretical values of transmission loss.6.3 Theoretical values of transmission loss may be calcu-lated using the equations for mass law:3TL 5 20log fm 2 47.7 (1)where:TL = transmission lo
23、ss, dB,f = frequency, Hz, andm = panel mass, kg/m2,or,TL 5 20log fw 2 33.9 (2)where:w = panel mass, lb/ft2.6.3.1 In these equations it is assumed that there is nosignificant sound energy transmitted for grazing incidencesound with angles of incidence between 78 and 90. The angle3Jones, Robert E., “I
24、ntercomparisons of Laboratory Determinations of AirborneSound Transmission Loss,” Journal of the Acoustical Society of America, Vol 66,No. 1, July 1979, pp. 148164.FIG. 1 Notching and Welding Corners of Steel AnglesFIG. 2 Construction Details of Steel Panels (not to scale)FIG. 3 Construction Details
25、 of Steel Panels (not to scale)E 1289 97 (2003)2of incidence is the angle made between the sound wave frontand the normal to the panel.7. Precision and Bias7.1 Test Method E 90 does not give results that agree withmass law at all frequencies. The values determined by thestandard for a given specimen
26、 are taken to be without bias.7.2 The between laboratory, 95 % Reproducibility Interval,which is approximately equal to 2.8 times the standard devia-tion of results, is shown in Table 1. These statistics are basedon a six-laboratory round robin evaluation conducted from1983 to 1985. A report coverin
27、g the results in detail has beenfiled at ASTM Headquarters.47.3 The within laboratory, 95 % Repeatability Interval forthis specimen tested in accordance with Test Method E 90, willbe determined some time in the future. Evaluations arepresently underway.7.4 The significance of the Repeatability and R
28、eproducibil-ity Intervals is as follows:7.4.1 Repeatability Interval, I(r)On the basis of test erroralone, the absolute value of the difference in two test resultsobtained in the same laboratory on the same material will beexpected to exceed I (r) only about 5 % of the time.7.4.2 Reproducibility Int
29、erval, I(R)On the basis of testerror alone, the absolute value of the difference in two testresults obtained in different laboratories on the same materialwill be expected to exceed I (R) only about 5 % of the time.8. Keywords8.1 reference specimen; sound transmission loss4Supporting data have been
30、filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: E331007.NOTE 1Wood frame caulked, specimen joints and perimeter taped onboth sides.FIG. 4 Installation of Reference Specimen Showing Caulking ofWood Frame and the Taping of the Specimen Joints andPerimeter
31、on Both SidesTABLE 1 Mean and Standard Deviation of Sound TransmissionLoss Data on a Single Steel PanelAOne-third Octave BandCenter, Frequency (Hz)Average Laboratory Valueof Sound TransmissionLoss (dB)Standard Deviation ofResults (dB)100 10.4 2.6125 11.8 1.2160 12.8 1.2200 14.8 1.3250 16.1 1.2315 17
32、.5 1.2400 19.2 0.9500 20.8 1.2630 22.7 1.1800 24.6 1.11000 26.4 1.01250 28.3 1.11600 30.3 1.02000 32.3 1.02500 34.0 1.03150 35.8 1.44000 37.4 1.55000 39.5 2.0ARefer to 4.2.3 for description of panels.E 1289 97 (2003)3APPENDIX(Nonmandatory Information)X1. Record FormPhysical Measurements of Steel She
33、ets and PanelsX1.1 A suggested record form for physical measurementsof the unassembled and assembled panels is shown in Fig.X1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard ar
34、e 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 responsible technical committee and must be reviewed every five years andif not
35、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 careful consideration at a meeting of theresponsible technical committee, which yo
36、u 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 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. X1.1 Suggested Record FormE 1289 97 (2003)4
