Research on the application of 3D spectrogram in bird tweet and speech signals

A new visualization method of researching bird tweet and speech signals is presented in this paper, this means that we use 3D spectrogram to display and analyze bird tweet and speech signals. In this paper, the hawk sound and swallow sound signals are taken as the research object of birdsong signals application, and Chinese and English are used as the research object of application of human speech signals. Compared with the 2D spectrogram of the bird tweet or speech signals, the 3D spectrogram not only improves readability, but also preserves all energy information, and it is clearer and more accurate in the energy change curve which represents bird tweet and speech signals energy change from high to low.