Table 2. Univariate one-way ANOVAs of the mean bouts' values amongst individuals, for each acoustic properties.
| Acoustic property | n. bouts | N | F (df 9) | p-value |
| Bout duration (s) | 7.8±5.0 | 78 | 2.8 | 0.007 |
| Number of pulses per bout | 7.8±5.0 | 78 | 3.1 | 0.004 |
| Number of tonal segments per bout | 7.8±5.0 | 78 | 1.3 | 0.240 |
| Pulse rate (1/s) | 7.7±4.8 | 77 | 2.5 | 0.014 |
| Tonal rate (1/s) | 7.7±4.8 | 77 | 3.7 | 0.001* |
| Pulse duration (ms) | 7.4±5.2 | 74 | 2.4 | 0.019 |
| Pulse peak frequency (Hz) | 7.4±5.2 | 74 | 1.3 | 0.246 |
| Tonal duration (ms) | 7.6±5.0 | 76 | 1.7 | 0.115 |
| Tonal fundamental frequency (Hz) | 7.6±5.0 | 76 | 8.8 | 0.000* |
| Tonal fundamental frequency I | 7.6±5.0 | 76 | 3.1 | 0.003 |
| Tonal fundamental frequency C | 7.6±5.0 | 76 | 2.2 | 0.034 |
| Tonal fundamental frequency F | 7.5±5.0 | 75 | 4.9 | 0.000* |
| Tonal frequency modulation (C-I) | 7.6±5.0 | 76 | 2.2 | 0.035 |
| Tonal frequency modulation (F-C) | 7.5±5.0 | 75 | 0.5 | 0.834 |
| Tonal frequency modulation (F-I) | 7.5±5.0 | 75 | 2.7 | 0.009 |
| Pulse-pulse interval (ms) | 5.7±5.0 | 57 | 1.5 | 0.193 |
| Pulse-tonal interval (ms) | 6.4±5.5 | 64 | 1.1 | 0.382 |
| Tonal-pulse interval (ms) | 5.1±3.4 | 51 | 1.7 | 0.124 |
| Tonal-tonal interval (ms) | 2.7±1.5 | 27 | 0.3 | 0.958 |
*statistically significant p-values (α = 0.05), after Holm-Bonferroni correction for multiple comparisons; n. bouts: mean and SD of the number of bouts contributed by the 10 individuals to the measured variate (all individuals differently contributed to each measured variate); N: number of bouts recorded for the measured variate amongst all individuals.