摘要
The structure, power spectrum and temporal parameters of the calling song of the bushcricket Gampsocleis gratiosa were studied with acoustic analysis techniques. The bushcricket uses an elytro-elytral mechanism in sound production: the denticulated vein ( file ) on the under-surface of the left elytron is rubbed by the insider edge of the right elytron ( plectrum ). The file-train of pulses is composed of one elytra-opening pulse and 6 - 7 elytra-closing tooth pulses. The power spectrum of the song covers a wide frequency band. The acoustic energy is mainly distributed over the frequency range between 3 and 35 kHz. The predominant peak lies near 7.5 kHz and the next one around 4.0kHz. The song intensity is measured of about 105 dB SPL at a distance of 10 cm from the animal. The temporal parameters of the song are dependent on the ambient temperature. Three-dimensional digital spectrograms of the song show its dynamic changes of the energy peaks. The bushcricket is very sensitive to acoustic stimuli and its thresholds are less than 30 dB SPL in the frequency range from 7 to 18 kHz, which corresponds to dominant energy zone. The auditory neurons of the bushcricket can code the temporal parameters of the calling songs.
The structure, power spectrum and temporal parameters of the calling song of the bushcricket Gampsocleis gratiosa were studied with acoustic analysis techniques. The bushcricket uses an elytro-elytral mechanism in sound production: the denticulated vein ( file ) on the under-surface of the left elytron is rubbed by the insider edge of the right elytron ( plectrum ). The file-train of pulses is composed of one elytra-opening pulse and 6 - 7 elytra-closing tooth pulses. The power spectrum of the song covers a wide frequency band. The acoustic energy is mainly distributed over the frequency range between 3 and 35 kHz. The predominant peak lies near 7.5 kHz and the next one around 4.0kHz. The song intensity is measured of about 105 dB SPL at a distance of 10 cm from the animal. The temporal parameters of the song are dependent on the ambient temperature. Three-dimensional digital spectrograms of the song show its dynamic changes of the energy peaks. The bushcricket is very sensitive to acoustic stimuli and its thresholds are less than 30 dB SPL in the frequency range from 7 to 18 kHz, which corresponds to dominant energy zone. The auditory neurons of the bushcricket can code the temporal parameters of the calling songs.
基金
The project is supported by National Natural Science Foundation of China
