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

... 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 UFC 3- 450-02 15 May 20 03 UNIFIED FACILITIES CRITERIA (UFC) POWER PLANT ACOUSTICS ... radiated sound power the total PWL minus the table 3 1 values. is then out the flow of impulsive-exhaust discharge...

Ngày tải lên: 27/06/2014, 23:20

... Tìm hiểu Microsoft Office 2007 - Tập 3: Tìm hiểu MS Powerpoint 2007 Biªn So¹n: Niemtin071@yahoo.com 13 Mỗi bài thuyết trình có một chủ đề. Chủ đề xác định phong ... 3. Khi chỉ con trỏ vào bất cứ chủ đề mẫu nào, bạn sẽ thấy nó hiện chủ đề đó lên slide i. Cách chèn hình ảnh hoặc những thành phần khác Tìm hiểu Microsoft Office 2007 - Tập 3: Tìm hiểu MS Powerpoint ... hiểu Microsoft O...

Ngày tải lên: 29/07/2014, 00:20

Ngày tải lên: 08/08/2014, 03:20