蟋蟀(Loxoblemmus doenitzi Stein)鸣声的特征和黑蝉(C.atrata Fabricius.)鸣声对其的影响

本文由1741个叫声的分析,给出了蟋蟀的鸣声特征和黑蝉叫声的影响.雄蟋招引声的每个单次叫声(SC)平均含有7.6个节拍,每个含有2个脉冲列组,每组含有4个主要的调幅脉冲列.每个SC的声长、间隔和平均重复周期(?)及节拍速(?)分别为1.285-1.325s,0.755—0.746s和2.078s及每秒7.6个节拍.鸣声谱的主峰频率(MPF)和MPF下降20db的带宽分别为5223±79Hz和(4498±82)—(5656±68)Hz.正在歌唱的蟋蟀鸣声基本上不受黑蝉自鸣声的影响,但黑蝉的前置自鸣声对蟋蟀鸣声波形有一定的影响.黑蝉的惊叫声不仅对蟋蟀鸣声波形有明显影响,而且时间特性有一定影响,即(?)约缩短一半,(?)的变差明显扩大.但对频率特性都无影响.

CHARACTERISTICS OF SONG IN CRICKET (Laxoblemmus doenitizi Stien) AND EFFECTS OF CALL IN BLACK CICADA ( C. atrata Fabricius. )

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