A teeth whitening apparatus includes a first ultrasound generator directed to emit in a first direction into a particular area, a second ultrasound generator spaced from the first ultrasound generator on a first side of the first ultrasound generator and directed to emit in a second direction angled toward the first direction into the particular area, and a third ultrasound generator spaced from the first ultrasound generator and the second ultrasound generator on a second side of first ultrasound generator and directed to emit in a third direction angled toward the first direction and the second direction into the particular area. One or more light emitting devices are spaced from the first ultrasound generator, the second ultrasound generator, and the third ultrasound generator, and directed to emit into the particular area.
