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| 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 |
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| 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 |
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