Table 3
Optimal prediction models for the mean levels of MNR after adding four types of water sounds.
| Model form | Type of added water sound | MNR type | Prediction model | R 2 |
|---|---|---|---|---|
| Refined independent effects model | Fountain sound | Subjective loudness | MSlL = 0.088LSS + 0.036LWS − 0.226T − 4.558 | 0.954 |
| Depression | MDeL = 0.095LSS + 0.025LWS − 0.244T − 4.478 | 0.959 | ||
| Discomfort | MDcL = 0.085LSS + 0.027LWS − 0.245T − 4.084 | 0.932 | ||
| Dissatisfaction | MDsL = 0.077LSS + 0.027LWS − 0.222T − 3.708 | 0.928 | ||
| Stream sound | Subjective loudness | MSlL = 0.098LSS + 0.034LWS − 0.072T − 4.914 | 0.972 | |
| Depression | MDeL = 0.102LSS + 0.019LWS − 0.103T − 4.556 | 0.977 | ||
| Discomfort | MDcL = 0.093LSS + 0.033LWS − 0.128T − 4.824 | 0.972 | ||
| Dissatisfaction | MDsL = 0.091LSS + 0.033LWS − 0.136T − 4.791 | 0.973 | ||
| Water-drop sound | Subjective loudness | MSlL = 0.090LSS + 0.023LWS − 0.218T − 4.076 | 0.958 | |
| Depression | MDeL = 0.094LSS + 0.008LWS − 0.183T − 3.607 | 0.947 | ||
| Discomfort | MDcL = 0.082LSS + 0.014LWS − 0.152T − 3.274 | 0.954 | ||
| Dissatisfaction | MDsL = 0.073LSS + 0.021LWS − 0.211T − 3.216 | 0.967 | ||
| Waterfall sound | Subjective loudness | MSlL = 0.087LSS + 0.055LWS − 0.160T − 5.209 | 0.975 | |
| Depression | MDeL = 0.097LSS + 0.031LWS − 0.181T − 4.651 | 0.964 | ||
| Discomfort | MDcL = 0.086LSS + 0.043LWS − 0.181T − 4.694 | 0.958 | ||
| Dissatisfaction | MDsL = 0.087LSS + 0.040LWS − 0.185T − 4.601 | 0.948 |
Notes: MSlL: Mean subjective loudness level; MDeL: Mean depression level; MDcL: Mean discomfort level; MDsL: Mean dissatisfaction level; LSS: Binaural LAeq of secondary radiation noise; LWS: Binaural LAeq of water sound; T: Threshold, 1 when WSNR exceeds −3 dBA but is no greater than 6 dBA, and global LAeq levels are between 60 and 65 dBA, otherwise 0; R2: Coefficient of determination.
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