Abstract: The present disclosure relates to a leak detection apparatus that includes an acoustic wave actuator mounted within a hermetically sealed chamber. The hermetically sealed chamber isolates a fluid medium from an external atmosphere and the acoustic wave actuator propagates an acoustic wave through the fluid medium. The apparatus further includes an acoustic wave transducer mounted within the hermetically sealed chamber and a comparison module. The acoustic wave transducer detects fluid pressure wave data related to the acoustic wave. The comparison module calculates an acoustic velocity based on the fluid pressure wave data and compares the acoustic velocity to a predetermined threshold velocity in order to recognize leaks in the hermetically sealed chamber.