SAE J 2629-2015 Standard Formats for Presenting Acoustical Data.pdf

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4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2629_201508 SURFACE VEHICLE RECOMMENDED PRACTICE J2629 AUG2015 Issued 2011-06 S

5、tabilized 2015-08 Superseding J2629 JUN2011 Standard Formats for Presenting Acoustical Data RATIONALE The committee cannot find users for the technical report. STABILIZED NOTICE This document has been declared “Stabilized“ by the SAE Acoustical Materials Committee and will no longer be subjected to

6、periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical requirements. Newer technology may exist. SAE INTERNATIONAL J2629 AUG2015 Page 1 of 20 INTRODUCTION Acoustical test results for standardized SAE and ASTM test procedures as well as no

7、n-standardized vehicle test procedures can be presented in a number of formats and scalings, making comparison(s) of results difficult in many cases. This document addresses the need for a consistent format for the presentation of various acoustical material, part and vehicle interior noise test dat

8、a. TABLE OF CONTENTS 1. SCOPE 2 1.1 Purpose . 2 2. REFERENCES 2 2.1 Applicable Documents 2 2.1.1 SAE Publications . 3 2.1.2 ASTM Publications 3 3. DEFINITIONS . 3 3.1 Modified Articulation Index 3 4. PROCEDURES . 4 5. TEST DATA 4 6. TEST SAMPLES . 4 7. TEST FACILITIES . 4 8. TEST FORMATS 4 8.1 Vehic

9、le Level Testing of Materials, Components and Systems on the Road or Chassis Dynamometer . 4 8.2 Material and Component Testing in the Laboratory 5 9. NOTES 5 9.1 Marginal Indicia . 5 9.2 General Comments . 5 SAE INTERNATIONAL J2629 AUG2015 Page 2 of 20 APPENDIX A INFORMATION FOR THE SAE J2629 SPREA

10、DSHEETS . 6 FIGURE 1 VEHICLE ROAD DATA - A-WEIGHTED SOUND PRESSURE LEVEL VERSUS ENGINE SPEED . 8 FIGURE 2 VEHICLE DYNO DATA - A-WEIGHTED SOUND PRESSURE LEVEL VERSUS ENGINE SPEED . 9 FIGURE 3 VEHICLE ROAD DATA - A-WEIGHTED SOUND PRESSURE LEVEL VERSUS 1/3 OCTAVE FREQUENCY 10 FIGURE 4 VEHICLE DYNO DATA

11、 - A-WEIGHTED SOUND PRESSURE LEVEL VERSUS 1/3 OCTAVE FREQUENCY 11 FIGURE 5 VEHICLE ROAD DATA - MODIFIED ARTICULATION INDEX VERSUS ENGINE SPEED 12 FIGURE 6 VEHICLE DYNO DATA - MODIFIED ARTICULATION INDEX VERSUS ENGINE SPEED 13 FIGURE 7 SAE J1400 SOUND TRANSMISSION LOSS . 14 FIGURE 8 ASTM C 423 RANDOM

12、 INCIDENCE SOUND ABSORPTION . 15 FIGURE 9A ASTM E 1050 NORMAL INCIDENCE SOUND ABSORPTION - 1/3 OCTAVE FREQUENCIES 16 FIGURE 9B ASTM E 1050 NORMAL INCIDENCE SOUND ABSORPTION - NARROW BAND FREQUENCIES 17 FIGURE 10 SAE J1637 COMPOSITE DAMPING LOSS FACTOR . 18 FIGURE 11A SAE J1637 COMPOSITE DAMPING LOSS

13、 FACTOR - 10 TO 1000 Hz . 19 FIGURE 11B SAE J1637 COMPOSITE DAMPING LOSS FACTOR - 100 TO 10 000 Hz 20 1. SCOPE SAE developed this document and associated spreadsheets at the request of automobile manufacturers to help compare products from multiple suppliers using standard data presentation formats.

14、 This document includes several preferred formats for presenting acoustical data on materials, components, systems, or vehicles. These formats cover the range of acoustical tests commonly conducted in the automotive industry. These tests follow SAE and ASTM test practices as well as vehicle specific

15、 test methods. For each test, the details of samples and test conditions can be entered into an applicable electronic spreadsheet together with the acoustical results data. These data are then linked to standard graphical display(s) for each test. All manufacturers and suppliers in this industry are

16、 encouraged to present data and results in these formats. Although this practice was developed specifically for use in the automotive industry, the formats may be usable in other industries and applications as well. 1.1 Purpose This document establishes recommended practices and formats for reportin

17、g of common acoustical results. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. SAE INTERNATIONAL J2629 AUG2015 Page 3 of 20 2.1.1 SAE Pub

18、lications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1400 Laboratory Measurement for the Airborne Sound Barrier Performance of Automotive Materials and Assemblies SAE

19、J1637 Laboratory Measurement of the Composite Vibration Damping Properties of Materials on a Supporting Steel Bar 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM C 423 Standard Te

20、st Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method ASTM E 1050 Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System ASTM C 384 Standard Test Method for Impedance

21、 and Absorption of Acoustical Materials by the Impedance Tube Method ASTM E 756 Standard Test Method for Measuring Vibration-Damping Properties of Materials 3. DEFINITIONS 3.1 Modified Articulation Index Modified Articulation Index (MAI) is calculated according to the following weighting factors and

22、 reference levels for respective 1/3 octave sound pressure measurements. MAI200 = 3.33/100*(64 - dBL200) MAI250 = 6.67/100*(69 - dBL250) MAI315 = 10.83/100*(71 - dBL315) MAI400 = 14.17/100*(73 - dBL400) MAI500 = 15.00/100*(75 - dBL500) MAI630 = 17.50/100*(75 - dBL630) MAI800 = 21.67/100*(74 - dBL800

23、) MAI1000 = 24.17/100*(72 - dBL1000) MAI1250 = 28.33/100*(70 - dBL1250) MAI1600 = 38.33/100*(67 - dBL1600) MAI2000 = 36.67/100*(65 - dBL2000) MAI2500 = 31.67/100*(63 - dBL2500) MAI3150 = 30.00/100*(60 - dBL3150) MAI4000 = 25.83/100*(56 - dBL4000) MAI5000 = 20.83/100*(51 - dBL5000) MAI6300 = 8.33/100

24、*(51 - dBL6300) Where, for example at 200 Hz, 3.33 is the weighting factor, 64 is the reference level and dBL200 is the linear or unweighted noise level for the 200 Hz 1/3 octave band frequency at the measurement location. Corresponding data for all 1/3 octave bands from 250 to 6300 Hz are used in t

25、he MAI calculation. MAI = sum of MAI200 through MAI6300; usually expressed as a percent (100% or higher = perfect intelligibility). SAE INTERNATIONAL J2629 AUG2015 Page 4 of 20 NOTE: This metric uses weighting factors common to the automotive industry; but, which are slightly different than similar

26、standards such as ANSI S3.5. 3.2 For all other definitions, see the respective test standards. 4. PROCEDURES All data collected either from standard test methods or company specific test methods can be presented in corresponding display formats. These formats include descriptions of the samples and

27、test conditions, followed by a graphical display of the results. Each display format corresponds to an applicable spreadsheet that can be used to enter test data as well as descriptions of the sample and the test facility. This information is then automatically transferred to a spreadsheet tab conta

28、ining a graphical display of the results with pre-set axis sizes, scales, and legends. Instructions for its use are shown on the first tab of each applicable SAE J2629 spreadsheet, which are directly downloadable within a single compressed file from SAE following the purchase of this standard. 5. TE

29、ST DATA The template for each graphical display accepts data in the rectangular Cartesian coordinate system where the horizontal axis is the x- axis or abscissa and the vertical axis is the y- axis or ordinate. The range of independent variables (x-values) covers the conditions of greatest interest

30、to the automobile manufacturers. The range of dependent variables (y-values) covers a wide dynamic range. In situations when dependent variables fall outside of the fixed dynamic range, data will appear on the graphical display at the top or bottom of the scale. However, the range selected for each

31、display will generally prevent this from occurring. Significant figures for data should be based on the accuracy inherent in the measurement system and as specified in the test method. 6. TEST SAMPLES Depending on the type of test conducted, the test sample may be a flat material, a molded component

32、, a sub-system or an entire vehicle. The template provides a data field to enter a description of the test sample. These details should describe the key physical characteristics and establish a baseline for comparisons to other samples included in the same graphical display. The user may add additio

33、nal information beyond the items listed in the template. 7. TEST FACILITIES The template requires details covering the test facility and test conditions, providing a reference to the source of the test data and to the engineer and/or technician who conducted the test. In some cases, these details ma

34、y help explain differences in data between identical samples tested at different test facilities. 8. TEST FORMATS Graphical displays have been prepared to cover the following test formats. For each test type, the graphical display has a fixed length and scale for each axis. 8.1 Vehicle Level Testing

35、 of Materials, Components and Systems on the Road or Chassis Dynamometer x Vehicle Road Test Data - A-weighted Sound Pressure Level versus Engine Speed, shown per Figure 1. x Vehicle Dyno Test Data - A-weighted Sound Pressure Level versus Engine Speed, shown per Figure 2. x Vehicle Road Test Data -

36、A-weighted Sound Pressure versus 1/3 Octave Frequency, shown per Figure 3. x Vehicle Dyno Test Data - A-weighted Sound Pressure versus 1/3 Octave Frequency, shown per Figure 4. x Vehicle Road Test Data - Modified Articulation Index versus Engine Speed, shown per Figure 5. x Vehicle Dyno Test Data -

37、Modified Articulation Index versus Engine Speed, shown per Figure 6. SAE INTERNATIONAL J2629 AUG2015 Page 5 of 20 8.2 Material and Component Testing in the Laboratory x Sound Transmission Loss per SAE J1400, shown per Figure 7. x Random Incidence Sound Absorption per ASTM C 423, shown per Figure 8.

38、Note that sound absorption values for frequencies beyond those valid for ASTM C 423 are shown for reference only. x Normal Incidence Sound Absorption per ASTM E 1050 (1/3 octave or narrow band), shown per Figures 9A and 9B. x Composite Vibration Damping per SAE J1637 (temperature), shown per Figure

39、10. x Composite Vibration Damping per SAE J1637 (frequency), shown per Figures 11A and 11B. 9. NOTES 9.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous

40、issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 9.2 General Comments These SAE data f

41、ormats are recommended for presentations to automobile manufacturers and for use by acoustic integrators, interior integrators, tier I suppliers, and other material suppliers. This SAE practice provides the best means for a user to then compare data on competitive materials, components, systems, or

42、vehicles. These data formats are to be used for data collected according to the commonly used test formats and test procedures listed in Section 5. The data collected from these tests, however, should not be considered as the only data that can be presented to an automobile manufacturer or other use

43、r. Additional data from other tests may also be presented using a format selected by the supplier or the user. In all cases, this additional information should be a supplement to the formats described in this document and not a replacement. To avoid duplication of effort in presenting data, test fac

44、ilities are encouraged to supply data to their test requestors using these formats. These formats can then be readily used in presentations to automobile manufacturers or to other users. This will also minimize errors generated when data is converted from one format to the SAE recommended format. In

45、 the future, revisions to these formats will be made to meet the ongoing needs of the users, which include both vehicle manufacturers and suppliers. Additional data formats may be added as new test practices are developed. Following purchase of the SAE J2629 text document and associated spreadsheets

46、, instructions will be provided for downloading a single compressed file containing a collection of spreadsheets from the SAE web site1. Use standard computer operating system utilities for uncompressing the collection of spreadsheets to your computer storage device. For questions or problems on the

47、 use of the SAE J2629 electronic spreadsheets, SAE may be contacted at CustomerServicesae.org. 1 This downloadable file contains a set of applicable SAE standard spreadsheets (the “Spreadsheets”). The Spreadsheets are copyrighted works and all rights, title and interest in and to the Spreadsheets ar

48、e owned by SAE International. SAE hereby grants you a nonexclusive, nontransferable license to use the Spreadsheets and to prepare one derivative work based on each Spreadsheet (the “Derivative”) provided that the SAE copyright notice appears on each Derivative as “ 2011 SAE International,” you agre

49、e that the use of any information contained in each Spreadsheet is provided “AS IS” and is entirely at your risk as the licensee, and you hereby indemnify SAE from any and all claims or damages caused by your use, modification, sale or application of the Spreadsheets and any Derivatives. Under no circumstances shall SAE International be liable for any costs, losses, expenses or damages (whether direct or indirect, con