Current Science

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Speech signal is a natural means of communication. It uses small units of sound to convey feelings and messages. Birds also use sound signals to express their emotions. Some birds, like parrots and crows, are capable of imitating the speech of other animals. The aim of this study is to compare the imitating capabilities of these birds with those of human beings. The software COMSOL Multiphysics has been used for investigating the effect of dimensional modifications of the vocal tract on the system output. The analysis of the results shows that the acoustic spaces used by human beings, parrots and crows are not overlapping, but similar in shape. Further, maximum formant scattering is observed in human beings and minimum for parrots. The results may be important for understanding the vocal tract modulation, for example, to generate artificial food calls to assemble the birds for feeding medicines to avoid spread of diseases, specifically by parrots and crows as they try to settle down near human civilizations.

Keywords

Birds Calls, Cardinal Vowels, Imitation, Speech Production.
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