Table 6.
Prediction models for mean discomfort level after mitigation.
| Situation | Model form | Prediction model | R 2 |
|---|---|---|---|
| No fountain sound added | No | MDcL=0.142L SM−5.287 | 0.993 |
| With fountain sound added | Independent effects model | MDcL=0.092L SM+0.008L FS−3.505 | 0.906 |
| With fountain sound added | Energy summation model | MDcL=0.101L T−3.911 | 0.770 |
| With fountain sound added | Modified energy difference model | MDcL=0.101L T−0.035SNR−3.963 | 0.916 |
| With fountain sound added | Refined independent effects model | MDcL=0.085L SM+0.027L FS−0.245T−4.084 | 0.932 |
| With fountain sound added | Refined energy summation model | MDcL=0.122L T−0.424T−5.042 | 0.918 |
| With fountain sound added | Perceptual model | MDcL=0.912MSLL−0.058 | 0.978 |
| With fountain sound added | Perceptual model | MDcL=1.294MLMD−0.890 | 0.741 |
Notes. MDcL: Mean discomfort level; LSM: Binaural LAeq of metro sound; LFS: Binaural LAeq of fountain sound; LT: Binaural LAeq of combined sound; T: Threshold, 1 when SNR exceeds −3 dBA but is no greater than 6 dBA, and global LAeq levels are between 60 and 65 dBA, otherwise 0; MSLL: Mean subjective loudness level; MLMD: Mean level of memory disturbance; R2: Coefficient of determination.
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