| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | CONTENTS CONTENTS <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | FOREWORD FOREWORD 1. PURPOSE 1. PURPOSE 2. SCOPE 2. SCOPE 3. MEASUREMENT UNCERTAINTY 3. MEASUREMENT UNCERTAINTY <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | 6. TEST FACILITIES AND INSTRUMENTATION 6. TEST FACILITIES AND INSTRUMENTATION <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 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. <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Figure 3 Radial position of the sampling tube. Figure 3 Radial position of the sampling tube. 9. CALCULATIONS 9. CALCULATIONS <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 10. INFORMATION TO BE RECORDED 10. INFORMATION TO BE RECORDED 11. INFORMATION TO BE REPORTED 11. INFORMATION TO BE REPORTED <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | APPENDIX A APPENDIX A TABLE A.1 TABLE A.1 <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | APPENDIX B APPENDIX B TABLE B.1 TABLE B.1 APPENDIX C APPENDIX C <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Figure C-1 Figure C-1 <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure C-2 Figure C-2 Figure C-3 Figure C-3 Figure C-4 Figure C-4 <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Figure C-5 Figure C-5 <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | APPENDIX D APPENDIX D APPENDIX E APPENDIX E APPENDIX F APPENDIX F <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | TABLE E.1 TABLE E.1 Figure E-1 Figure E-1 APPENDIX G APPENDIX G <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure E-2 Figure E-2 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ASHRAE Standard 68-1997 Laboratory Method of Testing to Determine the Sound Power in a Duct (AMCA Standard 330) (ANSI approved)<\/b><\/p>\n |