TABLE II.
Beamwidth of the large circular microphone array used for noise source localisation on the rotor at selected one-third-octave band frequencies.
| Freq.1/3, kHz | 3.2 | 4 | 5 | 6.3 | 8 | 10 | 12.5 |
|---|---|---|---|---|---|---|---|
| BW, m | 0.12 | 0.1 | 0.08 | 0.06 | 0.04 | 0.036 | 0.024 |
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