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Table 2.
Sum of squared errors (SSE) and R 2 values for sinusoidal fits in the standing-wave region using δ LS and δ m . Additional columns highlight the absolute SSE difference and ratio. Only the square, high-frequency case shows a clear model difference.
| Pipe | Freq. (Hz) | SSELS | SSEm | |ΔSSE| | SSELS/SSEm | R LS 2 | R m 2 |
|---|---|---|---|---|---|---|---|
| Circular | 870 | 0.0045 | 0.0045 | 0.0000 | 1.00 | 0.99 | 0.99 |
| Circular | 2056 | 0.0067 | 0.0062 | 0.0005 | 1.08 | 0.99 | 0.99 |
| Square | 474 | 0.0012 | 0.0012 | 0.0000 | 1.00 | 0.99 | 0.99 |
| Square | 875 | 0.013 | 0.027 | 0.0140 | 0.48 | 0.98 | 0.98 |
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