Stage 1
Studies Regarding:
- Theoretical aspects of the acoustic enclosures simulation and modeling – STRAERO
- Sound transmission theory – UPB
- Fuselage design principles – ROMAERO
- Legislation regarding noise measurements – INCDT COMOTI
- CRequirements for certain types of airplane – GECI
- Quality assurance requirements in aeronautical industry – ROMAERO
Stage 2
- Fuselage panel project, taking into account the applicable requirements – conceptual model
- 2 mathematical model for acoustic transmission phenomena thru the fuselage panel – conceptual model
Stage 3
- Fixing frame for the fuselage panel in the specific test bench – conceptual model
- Assembly device project for the fuselage panel – conceptual model
- Assembly device for the fuselage panel – functional model
- Mathematical model for acoustic transmission phenomena thru the fuselage panel – conceptual model
Stage 4
Stage 5
Emission room -- Reception room
f [Hz] |
L1 [dB] |
L2 [dB] |
L1-L2[dB] |
| 100 |
86,0 |
72,6 |
13,4 |
| 125 |
89,2 |
79,3 |
9,9 |
| 160 |
93,1 |
82,8 |
10,3 |
| 200 |
93,2 |
80,8 |
12,4 |
| 250 |
93,5 |
79,9 |
13,6 |
| 315 |
93,5 |
79,0 |
14,5 |
| 400 |
93,9 |
79,6 |
14,3 |
| 500 |
93,1 |
78,7 |
14,4 |
| 630 |
92,0 |
77,4 |
14,7 |
| 800 |
92,0 |
74,4 |
17,6 |
| 1 k |
91,9 |
73,5 |
18,4 |
| 1.25 k |
93,1 |
73,8 |
19,3 |
| 1.6 k |
94,6 |
73,9 |
20,7 |
| 2 k |
94,8 |
72,7 |
22,1 |
| 2.5 k |
94,8 |
70,0 |
24,8 |
| 3.15 k |
96,1 |
69,9 |
26,2 |
| 4 k |
96,0 |
67,9 |
28.1 |
| 5k |
89,5 |
59,3 |
30,3 |
|
