GAS-FILLED BUBBLE SEISMO-ACOUSTIC SOURCE

摘要

A sound source includes a tubular resonator configured to be filled with a gas. The exterior of the resonator includes rigid and elastomeric portions. The interior of the resonator includes a rigid tubular wall containing at least one orifice. The interior of the resonator also includes a first volume and a second volume. The first volume and the second volume are separated by the rigid tubular wall containing at least one orifice. The at least one orifice enables a flow of the gas between the first volume and the second volume. The interior of the resonator also includes at least one rigid tubular member configured to move along the rigid tubular wall. The position of the at least one rigid tubular member regulates at least one dimension of the path between the first volume and the second volume. The sound source also includes a volume velocity actuator disposed within the resonator and configured to perturb the gas within the resonator. The sound source also includes a processing circuit configured to provide a control signal to the volume velocity actuator to cause the volume velocity actuator to perturb the gas within the resonator at a frequency defined by the control signal.