The present invention provides a method for non-invasive acoustic stimulation of stem cells and/or progenitor cells in a patient. The invention also provides a device for non-invasive stimulation of stem cells and/or progenitor cells in the patient by generating and delivering acoustic waves of a suitable frequency and intensity to the stem cells and/or progenitor cells. The method and device of the present invention is useful in enhancing regeneration of bones and other tissues, such as cartilages, muscles, and nerve tissues, in a patient, for treatment of conditions such as bone loss or fracture.