NOISE AND VIBRATION CONTROL Episode 2 docx

... -14 -15 -15 -15 20 00 -9 - 12 -15 -16 -17 -17 -17 -18 -18 320 0 -10 -13 -16 -17 -18 -19 -19 -20 -20 5000 -10 -14 -17 -18 -20 -21 -21 -22 -23 7000 -10 -14 -16 -19 -21 -22 -23 -24 -25 10000 -10 -14 -19 -21 -22 -23 -24 -25 ... -14 -19 -21 -22 -23 -24 -25 -26 20 000 -10 -15 -20 -22 -24 -26 -27 -30 -30 Infinite -10 -15 -21 -24 -27 -30 -33 -36 -39 abo...

Ngày tải lên: 13/08/2014, 05:22

... 5-805-4/AFM 88-37/NAVFAC DM 3.10, dated 30 December 1983, recind DD Forms 22 94, 22 95, 22 96, 22 97, 22 98, 22 99, 23 00, 23 01, 23 02, 23 03, dated October 1983 ... 1-1 Explanation of Abbreviation and Terms 1-6 1-1 2. Noise and Vibration Criteria General 2- 1 2- 1 Noise Criteria In Buildings 2- 2 2- 1 Vibration Criteria In Building 2- 3 2- 4 3. Sound Distributi...

Ngày tải lên: 13/08/2014, 05:22

... Subtracted Band From Overall SPL (Hz) (dB) 31 9 63 9 125 7 25 0 7 500 6 1000 9 20 00 12 4000 18 8000 27 A-weighted, dB(A) 4 Figure C-7. Sound Pressure Levels of DRPR Motors at 3 ft. Distance. C -23 TM ... 32- 1090 BIBLIOGRAPHY Harris, Cyril M., Noise Control in Buildings, McGraw-Hill, New York, NY 1994 Jones, Robert S., Noise & Vibration Control in Buildings, McGraw-Hil...

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 20 00 46 46 52 3 5 4000 44 48 50 3 6 8000 48 52 54 3 ... C) Ratio S W /R 2 0.00 0.07 0.15 0 .25 0.38 0.54 0.75 1.0 1.3 "C" (dB) Ratio S W /R 2 "C" (dB) Ratio S W /R 2 &q...

Ngày tải lên: 13/08/2014, 05:22

... (lb/ft 2 ) 1-1 /2 3 6-1 /2 10 2 7 13 17 8 14 19 22 13 20 24 26 19 25 27 28 23 27 29 29 27 28 29 30 27 28 31 32 27 31 36 38 31 34 40 43 26 28 30 31 Notes : 1. Variations in surface area and edge-clamping ... Lumber (in.) 1/4 1 /2 1 2 4 Approximate Surface Weight (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...

Ngày tải lên: 13/08/2014, 05:22

... 19 6 7 9 10 12 15 18 20 22 7 8 10 12 14 17 20 22 23 8 10 12 14 17 20 22 23 24 10 12 14 17 20 22 23 24 24 12 15 17 20 22 23 24 24 24 15 18 20 22 23 24 24 24 24 18 20 23 24 24 24 24 24 24 d. Edge ... DT ft. dB ft. dB 1.3 0 18 23 1.8 3 20 24 2. 5 6 22 .5 25 3 .2 8 25 26 4 10 28 27 5 12 31.5 28 6.3 14 35.5 29 8 16 40 30 9 17 45...

Ngày tải lên: 13/08/2014, 05:22

... Width (inches) Octave Band Center Frequency (Hz) 63 125 25 0 500 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 ... (Hz) 63 125 25 0 500 1K 6 20 14 9 5 8 18 12 7 3 10 16 10 6 2 12 14 9 5 2 16 12 7 3 1 20 10 6 2 1 24 9 5 2 1 2...

Ngày tải lên: 13/08/2014, 05:22

... (Hz) in Ft. 63 125 25 0 500 1000 20 00 4000 8000 Low 3 2 4 8 14 21 22 14 11 Pressure 5 3 5 11 23 31 34 19 13 Drop 7 5 9 16 32 41 43 24 16 10 6 15 22 37 52 53 35 23 Standard 3 3 6 13 23 33 33 23 14 Pressure ... elbows is given below. Octave Band Center Frequencies 63 125 25 0 500 1k 2k 4k 24 x60 123 4568 60x24 23 456 8 10 24 x 12 123 4568 16x 12 0 123 468 Total IL 4...

Ngày tải lên: 13/08/2014, 05:22

... 5-805-4/AFJMAN 32- 1090 Table 8-7. Vibration Isolation Mounting for Boilers. 8-15 TM 5-805-4/AFJMAN 32- 1090 Table 8- 12. Vibration Isolation Mounting for Transformers. 8 -20 TM 5-805-4/AFJMAN 32- 1090 Table ... re- quired to achieve near inaudibility. The noise and vibration control methods given here are designed to be simple to follow and to put into use. If these methods a...

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 25 0 355 500 710 1,000 1, 420 2, 000 2, 840 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 1 12 141 178 22 4 28 2 355 447 5 62 708 891 1, 122 1,413 1,778 2, 239 2, 818 3,548 4,467 5, 623 7,079 8,913 11 ,22 0 14,130 17,780 16 20 25 31.5 40 50 63 8...

Ngày tải lên: 13/08/2014, 05:22