Table 2. Descriptive statistics of the acoustic parameters of each call type.

Type	Low frequency (Hz) mean ± SD	High frequency (Hz) mean ± SD	Duration (ms) mean ± SD	Peak frequency (Hz) mean ± SD	Frequency range (Hz)	No. of harmonics	Number of inflection points	Sound pressure level (dB) mean ± SD
A	6,412 ± 3,054	6,965 ± 3,152	117 ± 77	6,714 ± 3,092	1,269–14,007	1–3	1–2	96.07 ± 2.87
B	9,937 ± 3,980	10,489 ± 4,221	37 ± 28	10,205 ± 4,057	3,161–17,233	–	–	94.29 ± 1.65
C	558 ± 512	704 ± 543	324 ± 237	631 ± 519	99–6,192	–	–	106.16 ± 8.75
D	807 ± 410	975 ± 431	57 ± 54	891 ± 411	152–2,600	–	–	97.77 ± 7.17
E	1,776 ± 2,077	3,804 ± 2,151	468 ± 210	2291 ± 2,059	128–8,356	1–3	–	97.68 ± 4.76
F	799 ± 292	1,007 ± 337	74 ± 67	903 ± 309	231–1,605	–	–	96.04 ± 1.92
G	521 ± 310	971 ± 403	109 ± 53	613 ± 340	130–1,957	2	–	95.98 ± 2.73
H	841 ± 440	2,056 ± 1,357	197 ± 83	999 ± 508	238–5,236	3–4	–	102.03 ± 5.03
I	501 ± 280	3,361 ± 3,642	250 ± 209	560 ± 213	303–5,936	3–4	2	100.53 ± 6.80
J	758	5557	88	4,565	758–5,557	4	3	96.53