A mind machine (in some countries called a "psychowalkman") uses sound and/or light to alter the brainwave frequency of the user, resulting in altered states of consciousness that have been compared to those obtained from meditation and shamanic exploration.
A mind machine (in some countries called a "psychowalkman") uses pulsing rhythmic sound and/or flashinglight to alter the brainwave frequency of the user. Mind machines are said to induce deep states of relaxation, concentration and in some cases altered states of consciousness, that have been compared to those obtained from meditation and shamanic exploration.