Abstract: An ultrasound therapy system and method for providing therapeutic treatment to tissues using multiple, user-selectable frequencies generated from a single applicator sound head. The multi-frequency ultrasound therapy system and method includes a generator/control unit having a microprocessor for controlling and monitoring the generation and output of ultrasonic energy. A precision oscillator is connected to the microprocessor, and wave shaping circuitry is also provided to generate a wave-form for amplification by an output amplifier. The amplified high frequency wave-form is supplied to and drives an applicator sound head at an appropriate frequency for producing the desired therapeutic ultrasonic waves for treatment. Bonded to a cup member and positioned within the applicator sound head is a transducer crystal which converts high frequency wave-forms into mechanical (acoustic) vibrations, thus producing thermal energy in the form of heat for penetration into tissues under treatment.

Abstract: A system and method for interferential electrical current therapy wherein the region of beneficial interference may be positioned in the body of a patient by selectively controlling the electrical signal which is provided to each of two pairs of electrodes secured to the patient's body. Two electrical signals are provided which have frequencies that differ by a predetermined amount. The system comprises means for selectively amplifying, phase shifting, and mixing the second electrical signal with the first electrical signal and applying the mixed signal to a first pair of electrodes. The system further comprises means for selectively amplifying, phase shifting, and mixing the first electrical signal with the second electrical signal and applying the mixed signal to a second pair of electrodes.