NOISE AND VIBRATION CONTROL Episode 12 pps

... 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-Hill, New York, NY 1984 Fry, Alan, Noise Control in ... Engineering Noise Control, Unwin Hyman, Boston, MA 1988 Harris, Cyril M., Shock & Vibration Handbook, 3rd Edition, McGraw-Hill, New York, NY 1988 Ber...

Ngày tải lên: 13/08/2014, 05:22

... 10. NOISE AND VIBRATION MEASUREMENTS Objective 10-1 10-1 Sound and Vibration Instrumentation 10-2 10-1 Measurement of Noise and Vibration in Buildings 10-3 10-2 Measurement of Noise and Vibration ... 9-4 B-1. Bandwidth and Geometric Mean Frequency of Standard Octave and 1/3 Octave Bands B-6 UFC 3-450-01 15 May 2003 1 UNIFIED FACILITIES CRITERIA (UFC) NOI...

Ngày tải lên: 13/08/2014, 05:22

... level L pD1Rl ; D 2 and R 2 are the distance and Room Constant values for the new set of conditions for which the new sound pressure level L pD2R2 is wanted; and REL SPL DIRl and REL SPL D2R2 ... -9 -9 -9 500 -7 -9 -10 -11 -11 -11 -11 -11 -11 700 -8 -10 -12 -12 -12 -13 -13 -13 -13 1000 -8 -11 -13 -13 -14 -14 -15 -15 -15 2000 -9 -12 -15 -16 -17 -17 -17 -18 -18 3200 -10 -13 -16...

Ngày tải lên: 13/08/2014, 05:22

... Airborne noise and structureborne vi- bration radiated as noise may intrude into these occupied floors if adequate controls are not in- cluded in the building design. The approximate octave band “TL” ... side of 2x4-in. wood studs on 16-in. centers. Fill and tape Joints and edges; finish as desired. For equal width metal studs, add 3 dB in all bands and to STC. Type 3 One layer 5/...

Ngày tải lên: 13/08/2014, 05:22

... Slab and Floating Slab (in.) Octave Frequency 2 2 2 Band Add Following Values (in dB) to (Hz) Type 1-Type 4 TL Values 31 5 7 9 63 7 9 11 125 8 10 12 250 9 11 13 500 10 12 14 1000 11 13 15 2000 12 ... Values 31 5 7 9 63 7 9 11 125 8 10 12 250 9 11 13 500 10 12 14 1000 11 13 15 2000 12 14 16 4000 12 11 16 8000 12 14 16 STC 10 12 14 Note: 1. To achieve these values in pra...

Ngày tải lên: 13/08/2014, 05:22

... dB Octave Band Center Frequency, Hz 31 63 125 250 500 1000 2000 4000 8000 555556 7 8 9 555556 8 9 10 555567 9 10 12 5 5 5 6 7 9 11 13 16 5 5 6 8 9 11 13 16 19 6 7 9 10 12 15 18 20 22 7 8 10 12 14 ... barrier. 5-6. Reception of Outdoor Noise Indoors. An intruding noise coming from an outdoor noise source or by an outdoor noise path may be heard by neighbors who are indoors. a....

Ngày tải lên: 13/08/2014, 05:22

... the architect and engineer to problems of noise and vibration. This is an important first step to noise control. Without awareness, the noise problem is ignored in the design, and later problems ... the outdoor noise is estimated and the expected indoor SPLs are compared against the indoor noise criterion applicable to the neighbor’s building. f. Available noise control...

Ngày tải lên: 13/08/2014, 05:22

... of the elbows is given below. Octave Band Center Frequencies 63 125 250 500 1k 2k 4k 24x60 123 4568 60x24 23456 8 10 24x12 123 4568 16x12 0123 468 Total IL 4 8 12 16 20 26 34 (4) End loss. The end ... isolators and their range of static de- flections and natural frequencies as applied to two equipment categories (rotary and reciprocating) and two equipment locations (noncritical...

Ngày tải lên: 13/08/2014, 05:22

... 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 and recommendations are carried out, with ... tanks, large ducts, and some large pipe stands may not them- selves be noise sources, yet their pipes or their connections to vibrating sources transmit small amounts...

Ngày tải lên: 13/08/2014, 05:22

... middle-, and high-frequency noise; and noise control materials and treatments vary in their effectiveness as a function of frequency (usually, low frequency noise is more difficult to control; most ... scope of this manual, sound and vibra- tion measurements and instrumentation might be involved in two types of situations: noise and vibration in buildings, and commu...

Ngày tải lên: 13/08/2014, 05:22