Matches in DBpedia 2014 for { ?s ?p A mind machine (aka brain machine, in some countries called a psychowalkman[citation needed]) uses pulsing rhythmic sound and/or flashing light to alter the frequency of the user's brainwaves. Mind machines are said to induce deep states of relaxation, concentration, and in some cases altered states of consciousness,[citation needed] which have been compared to those obtained from meditation and shamanic exploration.[citation needed]The process applied by these machines is also known as brainwave synchronisation or entrainment. Mind machines work by creating a flickering ganzfeld. Since a flickering ganzfeld produces different effects from a static one, mind machines can often also produce a static ganzfeld.A mind machine is similar to a dreamachine in that both produce a flickering ganzfeld. The difference is that a dreamachine can be used by several people at once, but generally has fewer technical features than a mind machine.In the United States, these devices are not FDA-approved for sale. They have been found by a U.S. district court to be Class III medical devices, and consequentially require FDA pre-market approval. None of these devices have obtained this pre-market approval. Several companies selling these devices have been shut down and seen their devices destroyed.As of September 2013, Light and Sound devices are readily and legally available throughout the United States from many sources.[citation needed] In the late 1980s and early 1990's there was an intensive investigation into the medical claims made by some manufacturers and sellers. The FDA concluded that Light and Sound Machines were not medical devices and did not warrant regulation. Sellers and manufacturers were given guidelines for how they could advertise these devices,and were required to include a disclaimer and cautionary document with each machine.. }
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- Mind_machine abstract "A mind machine (aka brain machine, in some countries called a psychowalkman[citation needed]) uses pulsing rhythmic sound and/or flashing light to alter the frequency of the user's brainwaves. Mind machines are said to induce deep states of relaxation, concentration, and in some cases altered states of consciousness,[citation needed] which have been compared to those obtained from meditation and shamanic exploration.[citation needed]The process applied by these machines is also known as brainwave synchronisation or entrainment. Mind machines work by creating a flickering ganzfeld. Since a flickering ganzfeld produces different effects from a static one, mind machines can often also produce a static ganzfeld.A mind machine is similar to a dreamachine in that both produce a flickering ganzfeld. The difference is that a dreamachine can be used by several people at once, but generally has fewer technical features than a mind machine.In the United States, these devices are not FDA-approved for sale. They have been found by a U.S. district court to be Class III medical devices, and consequentially require FDA pre-market approval. None of these devices have obtained this pre-market approval. Several companies selling these devices have been shut down and seen their devices destroyed.As of September 2013, Light and Sound devices are readily and legally available throughout the United States from many sources.[citation needed] In the late 1980s and early 1990's there was an intensive investigation into the medical claims made by some manufacturers and sellers. The FDA concluded that Light and Sound Machines were not medical devices and did not warrant regulation. Sellers and manufacturers were given guidelines for how they could advertise these devices,and were required to include a disclaimer and cautionary document with each machine.".