NOISE AND VIBRATION CONTROL Episode 8 pdf

... feet. 8- 12 TM 5 -80 5-4/AFJMAN 32-1090 Table 8- 7. Vibration Isolation Mounting for Boilers. 8- 15 TM 5 -80 5-4/AFJMAN 32-1090 Table 8- 12. Vibration Isolation Mounting for Transformers. 8- 20 TM 5 -80 5-4/AFJMAN ... building and will give very satisfac- tory results acoustically. 8- 11 TM 5 -80 5-4/AFJMAN 32-1090 Table 8- 8. Vibration Isolation Mounting for Propeller-Type Coo...

Ngày tải lên: 13/08/2014, 05:22

... 1992 Beranek, Leo L., Noise & Vibration Control, The Institute of Noise Control Engineering, Washington, DC, 1 988 Schaffer, Mark E., A Practical Guide to Noise and Vibration Control for HVAC Systems, ... York, NY 1 984 Fry, Alan, Noise Control in Building Services, Pergamon Press, New York, NY 1 988 Bies, David A. & Hansen, C. H., Engineering Noise Control,...

Ngày tải lên: 13/08/2014, 05:22

... Example 7-6 7-9 8. Vibration Control Introduction 8- 1 8- 1 Vibration Isolation Elements 8- 2 8- 1 Mounting Assembly Types 8- 3 8- 3 Tables of Recommended Vibration Isolation Details 8- 4 8- 6 Vibration Isolation-Miscellaneous ... 10. NOISE AND VIBRATION MEASUREMENTS Objective 10-1 10-1 Sound and Vibration Instrumentation 10-2 10-1 Measurement of Noise and Vi...

Ngày tải lên: 13/08/2014, 05:22

... Shown. Distance (ft.) 1/2 1 2 4 6 8 10 12 16 Normal Raised 74 80 68 74 62 68 56 62 53 59 50 56 48 54 46 52 44 50 Voice Level Very Loud 86 80 74 68 65 62 60 58 56 Shouting 92 86 80 74 71 68 66 64 62 SIL is arithmetic ... 40 60 80 100 -3 -4 -4 -4 -4 -4 -4 -4 -4 200 -5 -6 -7 -7 -7 -7 -7 -7 -7 320 -6 -7 -8 -8 -9 -9 -9 -9 -9 500 -7 -9 -10 -11 -11 -11 -11 -11 -11 700 -8...

Ngày tải lên: 13/08/2014, 05:22

... Partitions. Octave Frequency Band Type Type Type Improvements (Hz) 1 2 3 A B 31 4 9 6 2 2 63 10 16 12 2 2 125 17 24 20 3 2 250 26 34 30 3 3 500 34 42 39 4 4 1000 40 48 46 4 4 2000 46 46 52 3 5 4000 44 48 50 3 6 80 00 48 52 54 3 ... 2x4-in. wood studs on 16-in. centers. Fill and tape joints and edges; finish as desired. For equal width metal studs, add 2 dB in all bands and to ST...

Ngày tải lên: 13/08/2014, 05:22

... (lb/ft. 2 ) 1 2 4 8 16 0 2 7 12 17 2 7 12 17 18 7 12 17 18 19 12 17 18 19 22 17 18 19 22 30 18 19 22 30 35 19 22 30 35 39 22 30 35 39 43 30 35 39 43 47 STC 18 21 24 28 33 Notes: 1. Surface weight based on 48 ... (in.) 4 6 8 10 12 Octave Frequency Band (Hz) 31 29 33 35 37 38 63 35 37 38 39 40 125 37 38 40 41 42 250 38 41 44 46 48 500 43 47 49 51 53 1000 48 53 54 56 5...

Ngày tải lên: 13/08/2014, 05:22

... 137 180 6500 76 77 79 82 86 94 1 08 143 189 7000 77 78 81 83 88 96 111 149 199 7500 78 79 82 85 89 98 115 155 2 08 8000 76 80 82 86 90 100 1 18 161 2 18 ket of snow are intermittent, temporary, and of solid ... 75 79 87 106 131 4000 71 72 73 75 77 82 91 112 141 4500 72 73 75 76 79 85 94 ll9 151 5000 73 75 76 78 81 87 98 125 161 5500 74 76 77 79 83 89 101 131 170...

Ngày tải lên: 13/08/2014, 05:22

... Width (inches) Octave Band Center Frequency (Hz) 63 125 250 500 1K 6 18 13 8 4 8 16 10 6 2 10 14 9 3 2 12 13 8 4 1 16 10 6 2 1 20 9 5 2 1 24 8 4 1 0 28 7 3 1 0 32 6 2 1 0 36 5 2 1 0 48 4 1 0 0 72 2 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 7 -8 TM ... the architect and engineer to problems of noise and vibration. This is an important first step to noise control. Without awareness...

Ngày tải lên: 13/08/2014, 05:22

... 43 BFI. 2 201og(p) 88 888 88 Eff. Corr. 6666666 Total Lw of Fan 104 100 96 95 91 89 85 (2) Diffuser Lw, w/o damper. From suppliers catalog. Table 7-6. Losses Caused by Duct Elbows. Duct Diameter Octave Band Frequency ... Mounting for Fan and Drive-Assembly of Propeller-Type Cooling Tower. 8- 6 TM 5 -80 5-4/AFJMAN 32-1090 CHAPTER 8 VIBRATION CONTROL 8- 1. Introduction. This chap...

Ngày tải lên: 13/08/2014, 05:22

... octave Center 16 Upper Lower band band limit limit Center 22 31.5 44 63 88 125 177 250 355 500 710 1,000 1,420 2,000 2 ,84 0 4,000 5, 680 8, 000 11,360 16,000 22,720 14.1 17 .8 22.4 28. 2 35.5 44.7 56.2 70 .8 89.1 112 141 1 78 224 282 355 447 562 7 08 891 1,122 1,413 1,7 78 2,239 2 ,81 8 3,5 48 4,467 5,623 7,079 8, 913 11,220 14,130 17, 780 16 20 25 31.5 40 50 63 80 100 125 16...

Ngày tải lên: 13/08/2014, 05:22