Binaural Beats, What are They?
You can create binaural beats by introducing two tones of different frequency into each ear. By playing one tone of 100Hz in one ear and playing another tone of 114Hz in the other ear, your brain will perceive a third tone or beat which is the phase difference between the two wavelengths of the original tones. This is how we naturally detect directional information using our ears.
A binaural beat is created when the signals integrate. Your brain will perceive a beat of 14Hz. Depending on the frequency of the phase difference it can sound like a wave or beat. If the frequency is low, it will sound more like a wave. If the frequency is higher is can sound like a very fast beat.
Stereo headphones must be used in order to make use of this technology. If you were to use speakers, the tones would mix in the air and not give you the desired effect. It can produce a monoraul beat, which can be used for brain wave entrainment (bwe). However, if the track was created for binaural beats, it should be used as such.
When listening to binaural beats, there may be a warbling sound initially until your brain adjusts. Also, having a hearing loss in one ear will not reduce the effectiveness of binaural beats because they maintain their intensity regardless of amplitude. Alternatively, masking the binaural beats with noise does not decrease their effectiveness, in fact, it has been shown to improve the entrainment process and have a more soothing effect.
Using binaural beats for bwe has been the topic of some debates. Binaural beats can be used to product beats from 0.235Hz to 26.25Hz. Above this frequency, the wavelength are longer than the distance of the skull. However, Dr. Gerald Oster concluded that these beats would be insufficient for bwe because the depth of the beat is only about 1/10 the volume of a whisper.
There are many companies that use binaural beats as the baseline in their products. These companies range from The Monroe Institute (Hemi-Sync), Centerpointe (Holosync), and I-Doser. They mix their beats with ambiance, music, noise and sometimes guided instructions.
There are other technologies which are more efficient like low-pass filter modulation, cross-feed modulation, isochronic tones, monaural beats, pitch modulation and auto-pan modulation. Every type has it’s own limitations. Our products use a combination of these methods to achieve the best possible results.
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