The high-efficiency tandem piston air gun is a new pneumatic seismic source with simple structure,convenient operation and low cost.It can create high-energy acoustic pulse signals,and effectively attenuate bubble responses.This paper briefly introduces the air gun with 0.8 liter at a pressure of 140 kg/cm2.The measurement shows that the gun has reached a maximum peak-peak sound pressure up to about 11.7 bar-meters.The ratio(P1-P2) is about 2.79.The energy of the acoustic pulse is concentrated within 200 Hz and the main frequency corresponding to the spectrum value is about 30 Hz.Its lowest frequency is below 10 Hz.
DownLoad: