Acoustic pulse source apparatus

An acoustic pulse source apparatus comprising:

• a pressure cylinder surrounding a pressurized volume;
• a floating piston slidably mounted in the pressure cylinder;
• a vented volume with a dividing wall to the pressurized volume;
• a bumper attached to the dividing wall, wherein the floating piston is configured to impact the bumper to end a piston stroke by the floating piston;
• vent valves in the dividing wall such that opening the valves allows air to flow from the pressurized volume to the vented volume;
• vent valve seats configured to provide a seal surface for the vent valves;
• an actuator piston connected to the vent valves;
• a return spring between the actuator piston and the dividing wall, the return spring configured to maintain the vent valves in a baseline closed position against the vent valve seats;
• a solenoid air valve in a baseline closed configuration;
• a pressure pipe configured to provide high-pressure air from the pressurized volume to the solenoid air valve,
• wherein a floating piston movement is based on a manipulation of the pressurized volume,
• wherein the floating piston movement generates acoustic energy.