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Cicadas sound loudly and interfere with traffic noise measurements. The frequency characteristics of some outdoors cicada sounds have been reported, but the background noise and distance to the cicada have not been considered. The aim of this work was to accurately measure the frequency characteristics of the A-weighted sound pressure level of each robust cicada sound. The frequency characteristics of the /mi/ and /n/ sounds were measured in a free field. The dominant frequencies were 4.7 kHz for the /mi/ sound and 15 kHz for the /n/ sound, and the distributions of the peak frequencies for their sounds were normal.
Misono et al. (Fri,) studied this question.