The present invention provides an apparatus and methods to deliver audible acoustic sound to the brain through bone conduction and to terminate snoring and sleep apnea. The apparatus comprises a control module and a device that measures signs of the snoring and the sleep apnea and generates the audible acoustic sound to arouse a subject. The device is reversibly attachable to a part of a head overlying a skull of the subject and uses a composite sensor comprising a reflectance pulse oximeter and a vibration sensor for the measurement and an acoustic speaker for generation of the sound. The device drives the acoustic speaker to produce human-conversational sound and non-human sound.
