Physics of Sound and Vibration: Effects On Human Electro-Dynamic Physiology

  Patent No. 3884218   Method of inducing and maintaining various stages of sleep in the human being (Monroe, Sep 30, 1970) Abstract A method of inducing sleep in a human being wherein an audio signal is generated comprising a familiar pleasing repetitive sound modulated by an EEG sleep pattern. The volume of the audio signal is adjusted to overcome the ambient noise and a subject can select a familiar repetitive sound most pleasing to himself.   Notes:   BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method of inducing sleep in a human being, and more particularly, to a method of inducing sleep by the generation of audio signals which are produced by the modulation of familiar repetitive noises with electroencephalographic (EEG) sleep patterns. 2. Description of the Prior Art The use of audio generators to induce sleep is well known in the prior a...

  Patent No. 3762396   Method and apparatus for inducing sleep by applying electrical pulses to plural portions of the head (Ballentine, et al., Oct 2, 1973) Abstract   A method and apparatus for inducing sleep, treating psychosomatic disorders, and aiding the induction of hypnosis in a patient is disclosed in which electric current pulses are passed through the brainstem via electrodes attached to the back of the head and forehead. The electric current pulses have a frequency of 8 to 10 cycles per second. A second stimulus of electric current pulses having a frequency of four times the first stimulus is passed through the optic nerve via electrodes attached to the temples and forehead. A third auditory stimulus produced by the first electrical stimulus is applied to the ears via sound attenuating chambers in order to acoustically isolate the patient from a noisy environment. The three stimuli are preferably synch...

  Patent No. 3712292   Method and apparatus for producing swept frequency modulated audio signal patterns for inducing sleep (Zentmeyer, et al., Jan 23, 1973) Abstract A method of producing sound signals for inducing sleep in a human being, and apparatus therefor together with REPRESENTATIONS thereof in recorded form, wherein an audio signal is generated representing a familiar, pleasing, repetitive sound, modulated by continuously sweeping frequencies in two selected frequency ranges having the dominant frequencies which occur in electrical wave patterns of the human brain during certain states of sleep. The volume of the audio signal is adjusted to mask the ambient noise and the subject can select any of several familiar, repetitive sounds most pleasing to him. Notes:   BACKGROUND AND OBJECTS OF THE INVENTION The present invention relates in general to a method and apparatus for producing sounds for...