412
Fig. 15.4 A spectrogram is a graphical representation of the sound in a time x frequency acoustic
domain. Here is a representation of the types of structural components typically present in
sequences of sounds produced by singing humpback whales (Megaptera novaeangliae), that is
called “song”. Each letter represents one sound. Each individual sound is called a unit (different
letters correspond to aurally distinctive sound units). Repeated groups of units are called phrases
(black lines). A theme is a set of phrases (gray line). “Songs” consist of repeated theme sequences
within a song session (1–4 complete the cycle, thereafter song session starts again)
M.R. Rossi-Santos
Fig. 15.4 A spectrogram is a graphical representation of the sound in a time x frequency acoustic
domain. Here is a representation of the types of structural components typically present in
sequences of sounds produced by singing humpback whales (Megaptera novaeangliae), that is
called “song”. Each letter represents one sound. Each individual sound is called a unit (different
letters correspond to aurally distinctive sound units). Repeated groups of units are called phrases
(black lines). A theme is a set of phrases (gray line). “Songs” consist of repeated theme sequences
within a song session (1–4 complete the cycle, thereafter song session starts again)
M.R. Rossi-Santos