Table 2.
Mean bias error (MBE) and root mean square error (RMSE) between accelerometer-based estimates and reference measures of voice acoustics and glottal aerodynamics from the /pae/ syllable productions in comfortable and loud voice for the PVH and NPVH patient groups and associated matched control groups with normal voices (n = 16 in each group) according to values from Table 1.
| Measure | PVH controls |
PVH group |
NPVH controls |
NPVH group |
||||
|---|---|---|---|---|---|---|---|---|
| MBE (%) | RMSE | MBE (%) | RMSE | MBE (%) | RMSE | MBE (%) | RMSE | |
| ACFL (ml/s) | ||||||||
| Comfortable | 7 (3%) | 14 | 7 (2%) | 20 | 6 (2%) | 23 | 10 (5%) | 39 |
| Loud | 4 (2%) | 10 | 45 (11%) | 108 | 6 (2%) | 44 | 9 (3%) | 23 |
| MFDR (L/s2) | ||||||||
| Comfortable | −20 (−7%) | 26 | −53 (−13%) | 72 | −18 (−5%) | 25 | −15 (−6%) | 101 |
| Loud | −25 (−6%) | 34 | −10 (−1%) | 228 | −42 (−7%) | 53 | −43 (−9%) | 68 |
| SGP (cm H2O) | ||||||||
| Comfortable | −0.4 (−4%) | 0.9 | −0.2 (−2%) | 1.1 | −0.1 (−2%) | 0.7 | 0.6 (6%) | 2.2 |
| Loud | −1.4 (−12%) | 1.5 | −1.4 (−8%) | 2.2 | −1.7 (−13%) | 1.9 | −1.4 (−10%) | 2.1 |
| OQ (%) | ||||||||
| Comfortable | 3.5 pp (5%) | 5 | 0.3 pp (0 %) | 5.6 | −1.8 pp (−3%) | 4.8 | 0.6 pp (1%) | 11.6 |
| Loud | 0.1 pp (0%) | 6.7 | −0.9 pp (−1%) | 8.2 | 3.4 pp (6%) | 8.6 | 5 pp (8%) | 8.3 |
| SPL (dB SPL) | ||||||||
| Comfortable | 1.9 dB (2%) | 2.5 | 2.4 dB (3%) | 2.6 | 2.5 dB (−3%) | 3.1 | 3.5 dB (4%) | 7.1 |
| Loud | 0.9 dB (1%) | 1.6 | 1.6 dB (2%) | 2.5 | 1.0 dB (−1%) | 2.0 | 1.1 dB (1%) | 2.6 |
Note. PVH = phonotraumatic vocal hyperfunction; NPVH = nonphonotraumatic vocal hyperfunction; ACFL = peak-to-peak airflow; MFDR = maximum flow declination rate; SGP = subglottal air pressure; OQ = open quotient; pp = percentage points; SPL = sound pressure level.