POWER PLANT ACOUSTICS Episode 3 ppt

... is (from eq. 7-18 in the N&V manual) (3- 2) where A is the area of the radiating wall, in ft. 2 Equation 3 3 combines equations 3 1 and 3- 2: (3- 3) This equation must be used carefully. For ... used in engine-driven power plants. Re- fer to chapter 7 of the N&V manual for noise data on these sources. 2- 13 Since the directivity is also related to wavelength 3- 3. Reactive...

Ngày tải lên: 12/08/2014, 16:21

... 4 30 and 4 31 . For a conservative estimate (lower value) of the inser- tion loss of the woods, the winter insertion loss from figure 4 -31 is used in Item 5 of figure 4 -32 . Item 4 of figure 4 32 ... are calculated with the use of DD Form 230 5. The calculation is carried out for this 15-MW engine in figure 4 33 . 4-48 The PWL criterion for the total power plant noise verse order, shows...

Ngày tải lên: 12/08/2014, 16:21

... C-1 Page 1-1 1-1 1-1 1-2 2-1 2-1 2-2 2-2 2-2 2 -3 2 -3 2-8 2– 13 2- 13 3-1 3- 2 3- 3 3- 4 3- 12 3- 12 3- 15 3- 15 3- 15 3- 16 3- 16 4-1 4-1 4- 43 4-52 i ARMY TM 5-805-9 AIR FORCE AFM 88-20 NAVY NAVFAC DM -3. 14 POWER PLANT ACOUSTICS DEPARTMENTS ... UFC 3- 450-02 15 May 20 03 1 UNIFIED FACILITIES CRITERIA (UFC) POWER PLANT ACOUSTICS Any copyrighted m...

Ngày tải lên: 12/08/2014, 16:21

... intermittently) as heard by community residents (whether on-base or off-base). Figures 3 3, 3 4, and 3 5 and tables 3 4 and 3 5 of the N&V manual provide relatively simple access to the method. If ... the NC and PNC curves. Also, in the N&V manual, paragraph 3 2d and 3 3 relate to speech interference by noise, and paragraph 3 2e offers criteria for telephone usage in the pres...

Ngày tải lên: 12/08/2014, 16:21

... mass flow than would exist at nor- ambient temperature. The manufacturers of 3 1 1 3- 7 3 6

Ngày tải lên: 12/08/2014, 16:21

... power plant noise. The N&V manual (para. 3 3c) summarizes the procedure. Figure 4–24 shows the CNR grid upon which the outdoor power plant SPLs are plotted (taken from Item 8 of fig. 4– 23) . ... Description of power plant. In this example, a 15-MW plant is supplied by the manufacturer in a packaged form as shown in figure 4–29. Item 13 shows an indoor noise excess of 3 t...

Ngày tải lên: 12/08/2014, 16:21

... . . . . C-1 Page 1-1 1-1 1-1 1-2 2-1 2-1 2-2 2-2 2-2 2 -3 2 -3 2-8 2– 13 2- 13 3-1 3- 2 3- 3 3- 4 3- 12 3- 12 3- 15 3- 15 3- 15 3- 16 3- 16 4-1 4-1 4- 43 4-52 i (1) Tonal components. For casing and inlet noise, ... 15- to 21-in. bores and 20- to 31 -in. strokes. Fourteen different 2 3

Ngày tải lên: 13/02/2014, 23:20

Ngày tải lên: 08/08/2014, 03:20