Patent No. 5159640 Apparatus for carrying out hypnotherapies
  Patent No. 5159640    Apparatus for carrying out hypnotherapies     (Bick, Oct 27, 1992)    Abstract   An apparatus for hypnotherapy which     has a plurality of headphone stations for the respective subjects and a central     station which can switch a control group therapy sound reproducer to all of     the headphone stations for initiating, deepening and withdrawal from hypnosis     stages. The headphone stations are associated with individual sound reproducers     for the individual suggestion programs and a microphone can be selectively connected     at the central station. A rushing water sound generator can be selectively connected     to the modulation stages of the central station or the individual loudspeaker     stations.   Notes:    BACKGROUND     OF THE INVENTION         Psychogenic-therapy methods using suggestive treatment with a therapeutic and     prophylactic character are gaining increasingly in importance, since there exists     a very high probability of a po...