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Changes in SPL with various riblet structure schemes.
| Scheme number | Total SPL (dB) | ΔLp |
|---|---|---|
| Original model | 71.1566 | — |
| A | 68.3390 | -2.8176 |
| B | 65.9669 | -5.1897 |
| C | 76.1547 | 4.9981 |
| D | 70.2097 | -0.9469 |
| E | 68.8993 | -2.2573 |
| F | 67.6845 | -3.4721 |
| G | 72.8036 | 1.6470 |
| H | 66.9558 | -4.2008 |
