Abstract: 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 inside edge of the right elytron (plectrum). The file-train of pulses is the element of the calling song. Each 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 in the f equency range between 3 and 35 kHz. The predominant peak lies near 7.5 kHz and the next one around 4.0 kHz. The song intensity is measured of about 105 dB L_p at a distance of 10 cm from the animal. The temporal parameters of the song are dependent on the ambient temperature. Three-dimentional digital spectrograms of the song show its dynamic changes of the energy peaks. The bu hcricket is very sensitive to acoustic stimuli and its thresholds are less than 30 dB L_p in the frequency zone from 7 to 18 kHz, which corresponds to the dominant energy range. The auditory neurons of the bushcricket can code the temporal parameters of the calling song.