Summary of Small Wind Turbine Noise Measurements at Wulf Test Field in dBA |
|
Hub |
Reference |
Slant |
|
|
Sound |
|
Projected |
|
Projected |
Turbine |
Height |
Position |
Distance |
SPL |
|
Power |
|
100 |
|
to 45 dBA |
Tested |
H |
Ro |
Ri |
@ 8 m/s |
@ 10 m/s |
@ 8 m/s |
@ 10 m/s |
@ 8 m/s |
@ 10 m/s |
@ 8 m/s |
@ 10 m/s |
|
m |
m |
m |
LAeq, ref |
LAeq, ref |
LWA, ref |
LWA, ref |
LAeq |
LAeq |
m |
m |
Ampair 100 |
Charging |
13.4 |
13.9 |
19.3 |
44 |
51 |
na |
na |
na |
na |
na |
na |
Unloaded |
13.4 |
13.9 |
19.3 |
49 |
56 |
80 |
86 |
32 |
38 |
50 |
75 |
Air 403 |
13.4 |
14.0 |
19.4 |
57 |
60 |
88 |
91 |
39 |
43 |
50 |
75 |
BWC 850 |
Charging |
19.2 |
20.4 |
28.0 |
48 |
53 |
82 |
87 |
34 |
39 |
22 |
45 |
Unloaded |
19.2 |
20.4 |
28.0 |
58 |
64 |
92 |
97 |
44 |
49 |
80 |
150 |
Ln= ambient, turbine parked. |
Ls+n= ambient plus wind turbine operating. |
Ls= wind turbine noise alone at reference postion Ro |
Ls= LAeq, ref, corrected level |
Atmospheric absorption=0.005 dB/m |