Table 8 Comparison between the measures of voice parameters with a face mask and without a face mask in female participants
From: The effect of wearing face masks on voice and intelligibility of speech during the COVID-19 pandemic
Female | With face mask | Without face mask | P value | ||
|---|---|---|---|---|---|
Mean | SD | Mean | SD | ||
Absolute jitter | 44.11 | 33.91 | 40.49 | 40.98 | 0.059 |
Shimmer in dB | 0.25 | 0.12 | 0.24 | 0.23 | 0.002* |
Noise to harmonic ratio (N/H ratio) | 0.12 | 0.02 | 0.12 | 0.03 | 0.058 |
Mean fundamental frequency (MFF) | 214.71 | 30.49 | 212.75 | 29.95 | 0.056 |
Maximum phonation time (MPT) | 12.08 | 2.95 | 12.93 | 3.09 |  < 0.001* |