FEATURES OF WAVEFORMS AND SPECTRA OF SONGS IN BLACK CICADA(Cryqtotymqana atrata Fabricius)
黑蚱蝉(Cryptotympana atrata Fabricius)鸣声的波谱特征

In this paper, the clic songs, the free songs and the chorus songs of black cicada were studied. The waveforms of the songs have both the amplitude and the similar modulation at the same time.1. The distributive width of the main peak frequency(MPF) of the click songs is between 2.64 and 5.73 kHz;2.MPF of the free songs are 3.6-6 kHz;3. MPF of the free songs in chorus are 4-7 KHz.