Table 11 Comparison between face mask types regarding the measures of voice parameters
From: The effect of wearing face masks on voice and intelligibility of speech during the COVID-19 pandemic
| Â | Surgical mask | Cloth mask | N95 mask | P value | |||
|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | ||
Absolute jitter | 54.13 | 35.88 | 47.72 | 27.05 | 35.92 | 11.91 | 0.146 |
Shimmer in dB | 0.28 | 0.17 | 0.26 | 0.09 | 0.20 | 0.05 | 0.103 |
Noise to harmonic ratio | 0.13 | 0.02 | 0.14 | 0.03 | 0.13 | 0.01 | 0.169 |
Mean fundamental frequency | 178.79 | 55.16 | 153.38 | 46.41 | 209.94 | 30.79 | 0.005* |
Maximum phonation time | 14.21 | 5.20 | 13.80 | 5.65 | 14.07 | 4.01 | 0.721 |