Table 2. The measured and predicted broadband pressure directivity angles match.
Aft tilt is evident in the sagittal planes, whereas the coronal planes show vertical directionality associated with vertical force generation. Harmonic modes 1–4 match well in the coronal plane and modes 1 and 2 match well in the sagittal plane.
| Broadband | Sag near | Cor near | Sag far | Cor far |
|---|---|---|---|---|
| Measurement [°] ± SD [°] |
99.4 ±3.1 |
88.0 ±3.4 |
97.4 ±3.2 |
89.1 ±4.6 |
| Model [°] | 102.3 | 90.2 | 97.8 | 90.0 |
| Sagittal nearfield | 1st | 2nd | 3rd | 4th |
| Measurement [°] ± SD [°] |
119.7 ±3.4 |
86.3 ±1.9 |
126.9 ±13.7 |
69.6 ±5.0 |
| Model [°] | 125.8 | 99.8 | 82.7 | 44.3 |
| Sagittal Farfield |
1st | 2nd | 3rd | 4th |
| Measurement [°] ± SD [°] |
120.4 ±4.4 |
85.4 ±2.2 |
116.6 ±24.4 |
70.8 ±5.1 |
| Model [°] | 125.6 | 99.8 | 78.9 | 44.6 |
| Coronal nearfield | 1st | 2nd | 3rd | 4th |
| Measurement [°] ± SD [°] |
86.7 ±8.8 |
89.7 ±2.7 |
88.7 ±9.3 |
89.8 ±4.1 |
| Model [°] | 89.9 | 90.2 | 89.9 | 90.0 |
| Coronal Farfield |
1st | 2nd | 3rd | 4th |
| Measurement [°] ± SD [°] |
89.4 ±6.6 |
90.2 ±2.8 |
90.5 ±10.3 |
90.9 ±7.2 |
| Model [°] | 90.1 | 90.0 | 90.0 | 90.0 |