Mean noise levels in the post-nasal space for different flow rates of CPAP
| Flow rate (litres/min) | 0.2 kHz | 0.5 kHz | 1 kHz | 2 kHz | 4 kHz | 6 kHz | 8 kHz |
|---|---|---|---|---|---|---|---|
| The number of individual measurements for each flow rate are shown in parentheses. | |||||||
| CPAP, Continuous positive airways pressure. | |||||||
| 5 (6) | 86.57 | 86.43 | 88.75 | 76.43 | 80.48 | 79.68 | 72.42 |
| 6 (7) | 86.74 | 89.30 | 87.90 | 77.2 | 75.09 | 72.83 | 66.41 |
| 7 (7) | 91.93 | 91.57 | 91.27 | 81.79 | 73.01 | 75.14 | 67.47 |
| 8 (7) | 90.64 | 93.18 | 93.72 | 82.61 | 80.89 | 78.50 | 73.37 |
| 9 (7) | 94.59 | 96.93 | 96.87 | 87.44 | 82.61 | 78.38 | 76.6 |
| 10 (7) | 101.9 | 102.2 | 100.3 | 90.84 | 90.04 | 88.51 | 84.83 |