Table 2. Acoustic parameters by level of obstruction.
| Overall | Level of obstruction |
p ValueA | ||
|---|---|---|---|---|
| Multi-level obstruction | Simple velopharynx obstruction | |||
| N (%) | 36 (100%) | 15 (42%) | 21 (58%) | |
| Peak sound frequency (Hz) | ||||
| Total (40 Hz–2000 Hz) | 1230 (385, 1495) | 1340 (1130, 1600) | 1130 (255, 1355) | 0.025 |
| B1 (40 Hz–300 Hz) | 260 (240, 290) | 280 (250, 300) | 250 (220, 268) | 0.008 |
| B2 (301 Hz–850 Hz) | 810 (780, 850) | 830 (790, 850) | 820 (718, 850) | 0.170 |
| B3 (851 Hz–2000 Hz) | 1910 (1690, 1980) | 1940 (1780, 1990) | 1785 (1433, 1940) | 0.046 |
| Snoring index (events/h) | ||||
| Total (40 Hz–2000 Hz) | 106 (38, 185) | 142 (43, 241) | 80 (34, 144) | 0.133 |
| B1 (40 Hz–300 Hz) | 79 (27, 145) | 94 (27, 208) | 71 (24, 130) | 0.446 |
| B2 (301 Hz–850 Hz) | 42 (13, 113) | 55 (30, 199) | 30 (4, 70) | 0.016 |
| B3 (851 Hz–2000 Hz) | 51 (5, 143) | 72 (25, 174) | 34 (1. 81) | 0.030 |
| Maximal sound intensity (dB) | ||||
| Total (40 Hz–2000 Hz) | 71 (65, 77) | 74 (70, 78) | 67 (62, 76) | 0.023 |
| B1 (40 Hz–300 Hz) | 61 (56, 65) | 63 (61, 66) | 58 (51, 62) | 0.001 |
| B2 (301 Hz–850 Hz) | 65 (59, 69) | 69 (65, 72) | 60 (56, 66) | 0.001 |
| B3 (851 Hz–2000 Hz) | 70 (63, 75) | 72 (69, 75) | 66 (54, 75) | 0.053 |
| Mean sound intensity (dB) | ||||
| Total (40 Hz–2000 Hz) | 52 (46, 57) | 54 (50, 58) | 48 (45, 53) | 0.021 |
| B1 (40 Hz–300 Hz) | 45 (40, 49) | 48 (42, 51) | 40 (38, 48) | 0.021 |
| B2 (301 Hz–850 Hz) | 49 (42, 52) | 52 (46, 53) | 48 (40, 51) | 0.036 |
| B3 (851 Hz–2000 Hz) | 54 (44, 57) | 56 (51, 58) | 48 (41, 56) | 0.131 |
| Mean sound frequency (dB) | ||||
| Total (40 Hz–2000 Hz) | 177 (128, 310) | 254 (143, 361) | 167 (120, 272) | 0.102 |
| B1 (40 Hz–300 Hz) | 122 (104, 146) | 122 (110, 147) | 119 (101, 146) | 0.324 |
| B2 (301 Hz–850 Hz) | 452 (418, 517) | 439 (384, 522) | 459 (420, 511) | 0.446 |
| B3 (851 Hz–2000 Hz) | 1206 (1094, 1305) | 1222 (1180, 1376) | 1149 (1060, 1277) | 0.133 |
NOTE: Numbers are median and interquartile range, unless otherwise noted as n (%).
AP-values are based on Fisher’s exa3ct tests for categorical variables and Mann-Whitney tests for continuous or skewed variables.