Open Access
Table 1
Sound propagating direction identification with rotation correction.
| Frequency f (Hz) | Incident angle θi (degree) | Focusing angle θa | Focusing angle θb | Errors ξ1 (%) | Errors ξ2 (%) |
|---|---|---|---|---|---|
| 1500 | 15° | 14.78° | 15.00° | 22 | 0 |
| 1500 | 30° | 30.30° | 30.00° | 30 | 0 |
| 3500 | 20° | 19.80° | 20.03° | 20 | 3 |
| 5500 | 5° | 5.17° | 4.95° | 17 | 5 |
| 5500 | 42° | 42.08° | 42.00° | 8 | 0 |
| 6500 | 37° | 36.90° | 36.99° | 10 | 1 |
| 7500 | 11° | 11.25° | 11.03° | 25 | 3 |
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