![]() ![]() Without knowing each person’s starting position, entrainment can be rather ‘hit and miss’. Boosting a certain brainwave state may be beneficial for one person, and emotionally uncomfortable for another. We are all different, especially when it comes to the distribution of our brainwaves. Usually the distribution is much spottier, with an excess in one area and a deficiency in another. People are very seldom deficient in a certain brainwave type in all areas of their brain. In practice, the claims are based on an overly-simplistic view of how the brain and the brainwaves function. While these claims are not entirely true, they are not altogether false either. It is sold with promises of increasing IQ, promoting weight loss, ‘mind-tripping’, enhancing creativity, concentration, inducing spiritual states and more. The beats seem to arise only during processing in the brain.There is a lot of marketing hype around brainwave entrainment. Each ear hears a continuous sound at a constant frequency. The amazing thing about binaural beats with headphones is that there is not really that superposition of sounds. However, physical overlays and interferences – ie beats – are actually present here. The effect works similarly when the sounds are output through speakers. At 438 Hz on the right ear, the frequency doubles to 2 Hz. For example, if the left ear hears a 440 Hz tone and the right ear 439 Hz, the difference results in a binaural beat per second (1 Hz). ![]() From the difference of the frequencies (in Hz) results then the frequency of the beats. The left and right ear are played slightly different tone frequencies. The unusual thing is that there are actually no beats at all (at least as long as you listen with headphones). An example of this are so-called binaural beats (in German: with two ears perceived strokes). The human ear has very strange abilities. ![]()
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