| CD | call duration |
| DF | dominant frequency |
| ND | note duration |
| NI | note interval |
| CV | coefficient of variation |
| SD | standard deviation |
| FFT | fast Fourier transform |
| ANOVA | analysis of variance |
| HSD | honestly significant difference |
| GLMM | generalized linear mixed model |
| CLMM | cumulative link mixed model |
| SNR | signal-to-noise ratio |
| PCM | pulse-code modulation |
| CI | confidence interval |
| ges | generalized eta squared |
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