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ASHRAE 68 97 1997

ASHRAE 68 97 1997

$24.38

ASHRAE Standard 68-1997 Laboratory Method of Testing to Determine the Sound Power in a Duct (AMCA Standard 330) (ANSI approved)

Published By Publication Date Number of Pages
ASHRAE 1997 26
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PDF Catalog

PDF Pages PDF Title
3 CONTENTS
CONTENTS
4 FOREWORD
FOREWORD
1. PURPOSE
1. PURPOSE
2. SCOPE
2. SCOPE
3. MEASUREMENT UNCERTAINTY
3. MEASUREMENT UNCERTAINTY
5 TABLE 1 Estimated Values of the Standard Deviation of Reproducibility of Sound Power Levels Determined According to this Standard
TABLE 1 Estimated Values of the Standard Deviation of Reproducibility of Sound Power Levels Determined According to this Standard
4. NORMATIVE REFERENCES
4. NORMATIVE REFERENCES
5. DEFINITIONS AND SYMBOLS
5. DEFINITIONS AND SYMBOLS
6 6. TEST FACILITIES AND INSTRUMENTATION
6. TEST FACILITIES AND INSTRUMENTATION
7 Figure 1 Test arrangement and limiting dimensions of test ducts, intermediate ducts, and transitions.
Figure 1 Test arrangement and limiting dimensions of test ducts, intermediate ducts, and transitions.
9 TABLE 2 Cross-Sectional Areas of Ducts
TABLE 2 Cross-Sectional Areas of Ducts
TABLE 3 Maximum Pressure Reflection Coefficients
TABLE 3 Maximum Pressure Reflection Coefficients
10 Figure 2 Limiting curves for the directivity of the sampling tube (broad-band noise of one-third octave bandwidth).
Figure 2 Limiting curves for the directivity of the sampling tube (broad-band noise of one-third octave bandwidth).
TABLE 4 Limiting Values of the Directivity Constant, K
TABLE 4 Limiting Values of the Directivity Constant, K
7. TEST ARRANGEMENT
7. TEST ARRANGEMENT
11 TABLE 5 Flow Velocity Correction, C3, in Decibels, for the Frequency Response of the Sampling Tube
TABLE 5 Flow Velocity Correction, C3, in Decibels, for the Frequency Response of the Sampling Tube
12 TABLE 6 Modal Correction, C4, for the Frequency Response of the Sampling Tube
TABLE 6 Modal Correction, C4, for the Frequency Response of the Sampling Tube
TABLE 7 Radial Positions of the Sampling Tube
TABLE 7 Radial Positions of the Sampling Tube
8. TEST PROCEDURE
8. TEST PROCEDURE
13 Figure 3 Radial position of the sampling tube.
Figure 3 Radial position of the sampling tube.
9. CALCULATIONS
9. CALCULATIONS
14 10. INFORMATION TO BE RECORDED
10. INFORMATION TO BE RECORDED
11. INFORMATION TO BE REPORTED
11. INFORMATION TO BE REPORTED
15 APPENDIX A
APPENDIX A
TABLE A.1
TABLE A.1
16 APPENDIX B
APPENDIX B
TABLE B.1
TABLE B.1
APPENDIX C
APPENDIX C
17 Figure C-1
Figure C-1
19 Figure C-2
Figure C-2
Figure C-3
Figure C-3
Figure C-4
Figure C-4
20 Figure C-5
Figure C-5
21 APPENDIX D
APPENDIX D
APPENDIX E
APPENDIX E
APPENDIX F
APPENDIX F
22 TABLE E.1
TABLE E.1
Figure E-1
Figure E-1
APPENDIX G
APPENDIX G
23 Figure E-2
Figure E-2

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ASHRAE 68 97 1997
$24.38