Sonic drilling is a quick, straightforward form of geotechnical drilling. A sonic drill head vibrates at a high frequency resonance and is controlled by the drill rig operator to cater to the specific geological conditions. As the resonant frequency becomes amplified, material at the cutting face is turned into fluid by the vibrating drill bit.
Sonic drilling vibrations can either be sent down the drill string to the drill bit or can originate inside the drill head itself. Either way, the vibrations do not affect the rest of the drilling rig due to an internal spring system.