A sonic oil recovery apparatus for use in a well has an injector tubing extending interior of the casing of the well, and a resonator tube affixed to or within the injector tubing. The resonator tube has an interior flow pathway so as to allow a fluid to flow therethrough from the injector tubing. The resonator tube is suitable for transmitting an acoustic signal approximately equal to the resonate frequency of a formation in the well. The resonator tube can have a plurality of orifices plates formed therein such that the fluid flowing through the resonator tube generates the acoustic signal. The resonator tube can alternatively be a solid state acoustic resonator therein.