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Table 4.
Summary of GLM results assessing the effects of frequency, device ID, pseudo-calibration status, loudness, and application type on differences in SPL measurements from a standard SLM in the applications Bolden and KTW.
| Term | Estimate | Std. Error | t value | Pr(> |t|) |
|---|---|---|---|---|
| (Intercept) | −11.930275 | 2.378888 | −5.015 | 6.65e−07 |
| Frequency | 0.903013 | 0.319925 | 2.823 | 0.004892 |
| Device | 5.638641 | 1.514727 | 3.723 | 0.000212 |
| KTW | 8.203424 | 2.947286 | 2.783 | 0.005517 |
| Pseudo-calibration | 10.763024 | 2.936603 | 3.665 | 0.000265 |
| Loudness | 0.149274 | 0.027351 | 5.458 | 6.59e−08 |
| Frequency × Device | −0.471494 | 0.071120 | −6.630 | 6.51e−11 |
| Frequency × KTW | −1.552947 | 0.412642 | −3.763 | 0.000181 |
| Device × KTW | −3.585927 | 1.533253 | −2.339 | 0.019614 |
| Frequency × Pseudo-calibration | −1.082972 | 0.410701 | −2.637 | 0.008543 |
| Device × Pseudo-calibration | 0.302351 | 1.345874 | 0.225 | 0.822313 |
| KTW × pseudo-calibration | −9.706696 | 3.775563 | −2.571 | 0.010338 |
| Frequency × Loudness | −0.006122 | 0.003882 | −1.577 | 0.115234 |
| Device × Loudness | −0.056617 | 0.016317 | −3.470 | 0.000551 |
| KTW × Loudness | −0.078716 | 0.034638 | −2.273 | 0.023340 |
| Pseudo-calibration × Loudness | −0.099622 | 0.034629 | −2.877 | 0.004133 |
| Frequency × Device × KTW | 0.258857 | 0.095051 | 2.723 | 0.006615 |
| Frequency × KTW × Pseudo-calibration | 1.301220 | 0.550027 | 2.366 | 0.018252 |
| Device × KTW × Pseudo-calibration | −1.933511 | 0.479782 | −4.030 | 6.16e−05 |
| Frequency × KTW × Loudness | 0.022364 | 0.005018 | 4.457 | 9.60e−06 |
| Device × KTW × Loudness | 0.030295 | 0.015980 | 1.896 | 0.058371 |
| Frequency × Pseudo-calibration × Loudness | 0.012142 | 0.005014 | 2.422 | 0.015685 |
| Device × Pseudo-calibration × Loudness | 0.017983 | 0.015912 | 1.130 | 0.258780 |
| KTW × Pseudo-calibration × Loudness | 0.087963 | 0.045219 | 1.945 | 0.052121 |
| Frequency × KTW × Pseudo-calibration × Loudness | −0.014753 | 0.006734 | −2.191 | 0.028789 |
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