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Gu J.,National Institute of Environmental Research | Lee J.,National Institute of Environmental Research | Lee W.-S.,National Institute of Environmental Research | Choi K.,National Institute of Environmental Research | And 2 more authors.
41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 | Year: 2012

The global warming caused the changes of our environment like an increasing tropical night phenomenon in the middle latitude areas. Especially, in Korea, the habitats of tropical Korean blockish cicada have changed from Jeju island located in Southern part of Korea to the whole areas of Korea because of the increasingly warming weather. As the habitats of tropical Korean blockish cicada have changed, the cicadas crying sound have been social problem because the tropical Korean blockish cicadas cry at middle of the night owing to the bright outdoor lights. So, the need to investigate actual condition of the cicada sound has been increasing in urban areas. In this research, we would measure the various kinds of the cicada sound to estimated the sound quality which has a information why human feel unpleasant to the cicada sound in urban areas(Incheon, Gwangju, Busan, Gyeonggido Anyang). And we analyzed the acoustical characteristics by Short Time Fourier Transform which is a time-frequency analysis method. And we estimated the sound quality of the cicada sound using by CADA- X signal process program to investigate the relations between the sound quality of the cicada sound and the time-frequency variation quality of the cicada sound. The information of the sound quality and the time-frequency variation about the cicada sound will be useful to discover why the human feel unpleasant to the cicada sound. Source

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