Swiftlet Vocalization in Echolocation
DOI:
https://doi.org/10.14419/ijet.v7i3.36.29070Published
06-05-2018Keywords:
5G, Coaxial probe, grid array antenna, mobile communications.Abstract
The most interesting feature of swiftlet vocalizations is many of its species utilize a sonar-like system to navigate in the darkness of their nesting caves. This way of navigation called echolocation, where the birds produce click-like sound of which the returned echo provides information about the bird's speed and position relative to an object. In this paper, echo clicks were investigated from the sound recorded in a birdhouse. Fast Fourier Transform and Spectrogram were computed using MATLAB to each click pair for five consecutive pairs. Spectrogram analysis of the echolocation click pairs revealed maximum frequency where higher energy peaks occur is between 5.513 kHz to 6.801 kHz for the first click and between 6.202 to 8.613 kHz for the second click. As the conclusion, with the analysis conducted on the signals provides the potential to study the echolocation behavior of swiftlet in more details.
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