CHARACTERISTICS OF SONG IN CRICKET (Laxoblemmus doenitizi Stien) AND EFFECTS OF CALL IN BLACK CICADA ( C. atrata Fabricius. )
蟋蟀(Loxoblemmus doenitzi Stein)鸣声的特征和黑蝉(C.atrata Fabricius.)鸣声对其的影响

In this paper , the chaeacteristics of song in cricket and effects of calling song in black cicada are given by analyses of 1741 calls.In the attracting song in male cricket , each single call (SC) contains 7.6 beats in average, each contains two pulse series groups and each group contains four main amplitude - modulation pulse trains. In each SC, the sound length, intermittence and mean repetition (RP) and beat mean rate(BR) are 1.285-1.325s, 0.755-0.746s and 2.078s and 7.6 beats per second, respectively. In sound spectra of song, the main peak frequency(MPF) and bandwidth at level 20 dB below MPF are 5223 ±79 Hz and 1 4498 ±82) (5656± 68) Hz, respectively.The song singing cricket is basically not effected by free song in black cicada, but the pre-free song in black cicada has some effects on acoustic waveform of song in cricket In black cicada, the protest call not only has obvious effects on acoustic waveform of song in cricket but also has some effects on time properties, i. e. the RP shortened by about half, and the variation of BR is remarkably enlarged But the effects on frequency property of song in cricket have not been found