Table 2.

The dominant time and frequency intervals based on the spectrogram

Time (s)	2	5	6	7	8	9	10	11	12
Frequency intervals (Hz)	140–340, 460–580	240–300	260– 620	340– 600	200–320, 480– 600	200–340	220–300, 460–600	220–320, 440–620	240– 340