Table 4.
Results table for linear regression of differences in acoustic measures between the original recordings and signals transmitted via telepractice, with overall severity of dysphonia, ambient noise, uplink Internet speed for the transmitter, and downlink Internet speed for the receiver as continuous predictors.
| Acoustic Measure | Overall severity of dysphonia |
Ambient noise (dB SPL) |
Uplink speed for the transmitter (Mbps) |
Downlink speed for the receiver (Mbps) |
||||
|---|---|---|---|---|---|---|---|---|
| β | p | β | p | β | p | β | p | |
| Vocal f o mean (Hz) | 0.60 | .329 | −1.81 | .047 | −2.10 | .027 | 4.49 | < .001 |
| Vocal f o SD (Hz) | −1.16 | .131 | −0.43 | .709 | −2.40 | .044 | 5.13 | < .001 |
| Vocal f o range (Hz) | 11.77 | < .001 | −5.68 | .137 | 1.94 | .625 | 6.45 | .048 |
| SPL range (dB) | 0.65 | .422 | 7.24 | < .001 | 3.24 | .010 | −7.07 | < .001 |
| HNR (vowel; dB) | 1.13 | < .001 | 0.80 | < .001 | 0.71 | .003 | −0.19 | .324 |
| L/H ratio (dB) | 0.07 | .766 | −1.34 | < .001 | 4.42 | < .001 | −1.54 | < .001 |
| L/H ratio (vowel; dB) | −0.19 | .577 | −5.83 | < .001 | 3.63 | < .001 | 0.54 | .208 |
| CPPS (dB) | 0.59 | < .001 | 0.57 | < .001 | 0.06 | .318 | −0.20 | < .001 |
| CPPS (vowel; dB) | 1.24 | < .001 | 1.00 | < .001 | 0.44 | < .001 | −0.28 | .004 |
Note. Level of significance: p < .005 (significant differences bolded in the table). β = standardized beta coefficient; Mbps = Megabits per second; f o = fundamental frequency; SPL = sound pressure level; HNR = harmonic-to-noise ratio; L/H ratio = low–high ratio; CPPS = cepstral peak prominence (smoothed).