Table 1.
Results of Linear Mixed Models (LMMs) for subjective responses in Experiment Part 1 (Annoyance, Arousal, Valence) as a function of Operating Condition (OC), Background Noise (BN) level, ASHP Sound Level, and their interaction. The reference levels (intercept) were Moderate OC with 31.5 dB(A) BN and 36.5 dB(A) ASHP Sound Level.
| Response type | Fixed effects | Estimate | Std. error | df | t value | p value |
|---|---|---|---|---|---|---|
| Annoyance | (Intercept) | 2.864 | 0.263 | 58 | 10.874 | 0.000*** |
| OC Minimum | −0.356 | 0.065 | 2044 | −5.488 | 0.000*** | |
| OC Maximum | −0.045 | 0.071 | 2043 | −0.636 | 0.525 | |
| BN 39.5 | 0.558 | 0.092 | 2043 | 6.043 | 0.000*** | |
| ASHP 40 | 0.840 | 0.094 | 2044 | 8.933 | 0.000*** | |
| ASHP 46 | 2.312 | 0.093 | 2043 | 24.941 | 0.000*** | |
| BN 39.5: ASHP 40 | −0.544 | 0.133 | 2045 | −4.087 | 0.000*** | |
| BN 39.5: ASHP 46 | −0.645 | 0.130 | 2043 | −4.960 | 0.000*** | |
| Arousal | (Intercept) | 2.817 | 0.194 | 59 | 14.518 | 0.000*** |
| OC Minimum | −0.230 | 0.051 | 2042 | −4.532 | 0.000*** | |
| OC Maximum | −0.060 | 0.055 | 2042 | −1.092 | 0.275 | |
| BN 39.5 | 0.365 | 0.072 | 2041 | 5.038 | 0.000*** | |
| ASHP 40 | 0.475 | 0.074 | 2043 | 6.457 | 0.000*** | |
| ASHP 46 | 1.617 | 0.073 | 2042 | 22.249 | 0.000*** | |
| BN 39.5: ASHP 40 | −0.215 | 0.104 | 2043 | −2.057 | 0.039* | |
| BN 39.5: ASHP 46 | −0.437 | 0.102 | 2041 | −4.280 | 0.000*** | |
| Valence | (Intercept) | 5.710 | 0.194 | 58 | 29.414 | 0.000*** |
| OC Minimum | 0.240 | 0.050 | 2044 | 4.810 | 0.000*** | |
| OC Maximum | 0.042 | 0.054 | 2043 | 0.768 | 0.443 | |
| BN 39.5 | −0.368 | 0.071 | 2043 | −5.177 | 0.000*** | |
| ASHP 40 | −0.600 | 0.072 | 2045 | −8.307 | 0.000*** | |
| ASHP 46 | −1.661 | 0.071 | 2044 | −23.304 | 0.000*** | |
| BN 39.5: ASHP 40 | 0.329 | 0.102 | 2045 | 3.218 | 0.001** | |
| BN 39.5: ASHP 46 | 0.447 | 0.100 | 2043 | 4.470 | 0.000*** |
Notes. * p < 0.05, ** p < 0.01, *** p < 0.001.
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