The SLRS Light and Sound Machine   Even though it may seem that personal success comes easily to certain people, every human being has the same potential that he or she can realize. While some people give up easily in critical life situations, others show their strength. They accept the challenge and rise to the occasion. The deciding factor is the personal will to adjust rapidly to the changing circumstances. Mental fitness plays an important role in our environment. It will be even more important in the future in light of our changing living conditions and help us: -to protect against psychological interferences -to establish positive and motivating life impulses -to amplify our mental capacities -to cope with difficulties and conflicts at work, family, sports and illnesses. Especially, under these circumstances it becomes apparent how well our mental fitness is developed. Mental conditions such concentration, relaxation or stress, fear and nervousness are produced by the brain through internal stimulants reacting to external impulses. During this process certain frequencies of the brain waves correspond with the respective mental and physical conditions. Research of the human brain as well as measurements of brain waves conclude that there are four basic active and passive conditions of the brain, which are in direct correlation with the physical reactions. The SLRS (Sound & Light Relax System) utilizes these results of brain research as follows: 1. Beta-Waves (above 13Hz, at centre about 14-16 Hz) These waves determine brain activity during awake, tense and active conditions. At the forefront are the consciousness, influenced by external stimuli, the processing of mental impressions and critical thinking. Within the constructive beta area, a condition of elevated concentration is present. Elevated frequencies past a certain limit cause destructive conditions, such as stress, fear or even panic. Overly elevated beta-wave-shares cause a higher output of stress-hormones. 2. Alpha-Waves (8-13 Hz) They appear in a relaxed condition when the eyes are closed in the stage between sleep and waking hours. Characteristics are pleasant relaxation, positive mood and a feeling of body and spirit� integration. 3. Theta-Waves (4-8 Hz) They usually develop during sleep, dreaming and deep meditation. The formation of the sub-consciousness is now active. This zone is characterized by vivid imagination ability, improved learning and recollection ability, fantasy and intuition. 4. Delta-Waves (0.5-4 Hz) They appear mostly during deep-sleep and are rarely experienced during wakening hours. The accompanying psychological conditions are a dreamless sleep, trance and deep-hypnosis. Delta waves are of great importance for healing processes as well as the functioning of the immune system.