It is theorised that using binaural beats can change the brain’s frequency to match that of the binaural beat, and stimulate the brain to change state. As the human hearing can only (at best) listen down to 20Hz, you need to use binaural beats, monaural beats or isochronic tones to change frequency.īinaural beats could be used, for instance, to entrain the brain to operate at a frequency usually associated with a deep sleep, while the listener is still awake. As the brain slows down its operating frequency to match the binaural beat, it will start to relax and induce an almost meditative state. Brainwave entrainment is the process of changing the brain’s operating state by the use of external stimuli, such as binaural beats. The brain is known to operate at various frequencies, depending on its state. After this he considered the impact on humans in medical situations. The research by Gerald Oster focused on how some animals might be using binaural beats to pick out specific noises, with brilliant spacial accuracy. Monaural beats use the same principle, except the ‘beat’ frequency does not occur inside the head it is already present in the audio.īinaural beats were first discovered in 1839 by Heinrich Wilhelm Dove, but wasn’t further investigated until the late 20th century. If the individual sounds do not get played to each ear, and are mixed ‘outside’ of the head, then another audio phenomena occurs: monaural beats.
This 5Hz frequency is perceived as a slight increase and decrease of volume inside the head, 5 times a second.īinaural beats can only be achieved by using stereo headphones, so that each ear can receive the pure frequency, without interference from the other.
Binaural beats are an audio phenomena that are not present in the natural world.įor an example, if you played a pure 500Hz frequency into your left ear, and a 505Hz frequency into your right, this would create a binaural beat frequency of 5Hz. The two frequencies are played into either ear, and the difference is perceived by the brain as a third frequency. Binaural beats are the artificial creation of an audible frequency, that is not naturally in the range of human hearing, by using the difference between two other frequencies.
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