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📝 Writer: Betül Eda Korhan ✅ Editor: Aysuda Ceylan
Have you ever heard of Binaural rhythms? Binaural rhythms have been brought up recently by reducing stress levels, improving sleep and even increasing mental functions. They are rhythms that thousands of people add to their music charts and adapt to everyday life.
When your left ear hears a slightly different tone than your right ear, you perceive a rhythm that is not present in the music you are listening to. Binaural means ‘from both ears ‘ in Latin.
These rhythms are used as “digital drugs” because of their affect on brain waves.
Binaural (from both ears) hearing allows the identification of the source by the perception of the sound reaching both ears. Binaural rhythm is a physiological response when sound is consciously applied to both ears with different frequencies.
Heinrich Wilhelm Dove, found for the first time the effects of Binaural rhythms in 1839.
Let’s say we listen to two different sound waves, 440 Hertz and 446 Hertz, from one speaker. Sound waves interact with the general feature of sound. They spread periodically with amplifying and damping each other.
This time let’s say we listen to two waves of 440 and 446 Hertz with a headset, now we hear the sound as 6 Hertz even though there is no external environment for the sound to interact physically (e.g. the room you are in).
We hear monoural rhythms with two ears but one ear is enough to detect them. Two ears are required for binaural (with two ears) rhythms to be heard and perceived.
Brainwaves are detected using sensors placed on the scalp. These signals, measured with electroencephalogram (EEG). There are mainly 4 types of brain waves.
Alpha Pattern: Binaural beats in the alpha pattern are at a frequency of 8–13 Hz. It is recorded in the EEG of awake adults at a rest.
Beta pattern: Binaural beats in the beta pattern are at a frequency of 14–80 Hz.These waves seen in the case of over-activation, anxiety or stress of the central nervous system.
Theta pattern: Practitioners set binaural beats in the theta pattern to a frequency of 4–7 Hz. They usually occur in degenerative states of the brain.
Delta pattern: Binaural beats in the delta pattern operate at a frequency of 3–5 Hz. These waves seen in deep sleep of healthy children and adults with brain damage.
In an experiment with 32 participants to investigate the effects of Binaural beats on long-term memory, participants were blindfolded and asked to remember the words spoken to them while listening to different frequencies sounds, Beta (20 Hz) and Theta (5 Hz) waves. Beta-frequency binaural rhythms listeners have high rates and the correct order of recall of words. The rate of recall of words decreased with the participants who listens to theta-frequency rhythms. As a result of this experiment, it was determined that binaural rhythms could affect long-term memory for good or bad according to which frequency is used.
The most participants in the Binaural hearing experiments say that they experienced emotions close to trance and hypnosis.
Binaural rhythms also knowns as ‘’I-doser’’ and ‘’digital drugs’’. This beats, which can be downloaded from almost any platform can change the mood of people with its repetitive rhythms. Some of these rhythms, classified on the internet for their effect on moods as “ “Brain+” (creativity and intelligence enhancer), “anesthesia” (powerful painkiller), “Gate of Hades” (feeling of death), ” LSD ” (powerful Open-Eye hallucinations)
The doses have different ratings:” mild“,” moderate“,” strong”. One dose doesn’t have the same effect on every person. Psychological factors and focusing also change the level of influence of beats.
The researchers say that they need more studies and trails to show the benefits of Binaural beats. They also say that the useage could be under control for the right way to avoid the harmful effects.
Here is a Binaural beat to improve your sleep.
Fran López-Caballero, Carles Escera Front. Hum. Neurosci., 15 November 2017