摘要
蚱蝉单发声膜发出的click声波形由高幅值和低幅脉冲列(pulse train,PT)组成.高幅值PT含脉冲越多,主峰频率(main peak frequency,MPF)就越高.本文进一步阐明:1、高幅值PT多含有11个脉冲,当含有1,2,3个时,脉冲个数与MPF成准线性关系 超过三个为非线性关系.2、双发声膜发声的频带主要在2700Hz-6700Hz之间.数个click声组成的波形中,低幅值PT功率谱包络波近似于标准高斯型,MPF约为4900Hz;不同高幅值PT内含主脉冲的频率不同是MPF变化的主要因素.3、蚱蝉鸣声功率谱主要有三个子谱区A,B,及C,对应的频带依次约为2700Hz—3700Hz,3700Hz-5700Hz,及5700Hz—6700Hz.
In cicada Cryptotympana atrata the click songs were produced by a single tymbal, its waveforms consisted of high and low amplitude pulse train(PT). The more the numbers of contained pulses in high - amplitude PT, the higher the main peak frequency(MPF)[6], In this paper, it shoud be further clarified:1、 There was at most 11 pulses in high-amplitude PT. When the numbers of high - amplitude pulse were among 1-3 pulses, the relationship between the number of pulse and MPF of click song was approximately linear, otherwise was nonlinear.2、 The bandwidths of the song were nearly 2700 - 6700Hz when the songs were produced by a pair of tymbals. If the waveforms consisted of several click songs, the envdoped waves of the power spectra were proximally standard Gauss-form and MPF were at about 4900Hz in the low - amplitude PT; the change of MPF was obviously caused by different frequency components of main pulse in high - amplitude PT.3、 The main power spectra of the cicada's song were proximally divided into three subspectra, A: 2700Hz-3700Hz, B: 3700Hz - 5700Hz, and C: 5700Hz-6700Hz.
出处
《生物物理学报》
CAS
CSCD
北大核心
1990年第4期443-448,共6页
Acta Biophysica Sinica
基金
国家自然科学基金的资助
