There are primarily three ways to elicit the frequency following response through an audio: binaural beats, monaural beats, and isochronic tones.  Binaural beats was the first method to be discovered, and has been used since the 80’s, after being first made known and popular by Robert Monroe of the Monroe Institute (the institute is still around today, though Mr. Monroe has passed away).  Binaural beats basically work in this way: one specific frequency/beat is played in one ear, let’s say, 1115 hz., while one slightly different frequency is played in the other at the same time, let’s say, 1120 hz.  What the brain will naturally do while exposed to these two frequencies in either ear is create its own “phantom” beat, that is the difference between the two frequencies.  In this case, it would be 5 hz., which is the frequency of the theta brainwave state.  Therefore, your brain would be led into the theta state.  At the same time, your brain working to combine these frequencies also ends up synchronizing its two hemispheres, and functioning in a whole-brained fashion while the listener is using the audio.
Binaural beats are created from two different continuous tones, which when sent separately to each ear create a single beat inside your head. Isochronic tones are basically a single tone which is switched on and off at regular intervals. Imagine a single continuous tone playing on a stereo system and you’ve got your hand on the volume switch. Then once per second, you turn the volume off for half a second and keep doing that every second. For half a second the volume is off, for the other half a beat waveform is formed. The beat is cycling once per second per second, i.e. at a rate of 1Hz.

Lucid dreaming: A lucid dream is considered a dream that a person is aware of and often able to consciously manipulate.  Many have alleged that using brainwave entrainment technology makes it easier to experience a lucid dream.  Scientists have studied this phenomenon and noticed that beta frequencies within the range of 13 to 19 Hz tend to be generated to keep the person conscious.  Additionally there is significant increased activity in the parietal lobes of the brain, which allows an individual to stay conscious.
In BrainAscend, each brainwave frequency is stimulated for several minutes before progressing deeper.  Much like a staircase type of progression, but with small and smooth steps. This is the most effetive way and also stimulates the release of "feel good" brain chemicals such as serotonin which makes you feel happy. This chart shows the range that each level covers as well as the whole program.
I personally have been experimenting with binaural beats – both in and out of the float tank – for the past year or so and they have quickly and easily become one of my favourite go-to “hacks” for helping me achieve a desired state of being. From listening to a specific track right before going to sleep which helps put my mind and body in a state of relaxation and recovery to, on the flip-side, listening to a track that helps prime my brain-state for creativity and focus right before I sit down to do some work – like writing this blog! They are also an enjoyable and effective asset to try out and experiment with while in the float tank. For the reasons mentioned above, as well as the sound frequencies can resonate a subtle but noticeable vibration in the tank, water and your body making for quite the unique floating experience!
Changes in neural oscillations, demonstrable through electroencephalogram (EEG) measurements, are precipitated by listening to music,[20][21][22][23][24][25] which can modulate autonomic arousal ergotropically and trophotropically, increasing and decreasing arousal respectively.[26] Musical auditory stimulation has also been demonstrated to improve immune function, facilitate relaxation, improve mood, and contribute to the alleviation of stress.[27][28][29][30][31][32][27][33] These findings have contributed to the development of neurologic music therapy, which uses music and song as an active and receptive intervention, to contribute to the treatment and management of disorders characterized by impairment to parts of the brain and central nervous system, including stroke, traumatic brain injury, Parkinson's disease, Huntington's disease, cerebral palsy, Alzheimer's disease, and autism.[34][35][36]
Many psychologists, doctors, teachers, and other professionals have endorsed the technology while personally taking advantage of the limitless benefits that accompany EquiSync's precisely designed brainwave synchronization/ entrainment technology. It is such a profound field of study that many of the metaphysical benefits, those beyond our current scientific measure and technological & philosophical understanding, have yet to be discovered.
***NOTE: (Last one) Please do research on which brainwaves do what before just trying out the first track you find! Also read descriptions of what frequencies are being used in the track, so you know what you are training your brain to! (Example: You struggle with OCD and have some anxiety. You see a track titled “Clear, Focused Thinking” and you try it out w/o reading the description. You either do not experience anything or you end up with worse anxiety/headache than before. If you knew before starting, that your problems were caused by too much Beta wave activity in your brain and the track was all low Beta ramping up to high Beta – you would not listen to it!)
Beta brainwaves are next highest in frequency after alpha waves, occurring at 13 to 30 hertz. Beta brainwaves are what we experience every day as we are awake and using our analytic mind. Beta brainwaves are needed for concentrating on mental tasks, and when they are present for too long of a time, they lead to stress, anxiety, and even paranoia. Most people do not have trouble achieving beta brainwaves and in fact suffer from spending too much time in beta brainwave patterns. However, those with attention deficit disorder (ADD) who have problems focusing their attention can benefit from learning how to achieve and remain in beta brainwave states for longer amounts of time.
Thanks Lorita. There hasn’t been any isochronic tones research that I’m aware of, for anti-aging, fat loss or attracting people, or any significant anecdotal feedback. You could combine positive affirmations or hypnosis scripts with isochronic tones to try and change habits and that could help with fat loss or build confidence to attract people. But it would be the affirmations and hypnosis doing most of the work, the isochronic tones would just be used to help relax the listener and put them in a more suggestible state. I don’t believe isochronic tones can affect those things, without being used in combination with some kind of vocal mental programming.
Hi EJ, at the moment, there hasn’t been any research to give an indication of how long you should or shouldn’t listen for. Over time, I’ve seen people use my tracks for longer and longer. I started off providing 30-minute study tracks, but through demand, I extended them to 3-hours. I know from the many thousands of comments I’ve had on YouTube that a large number of people play those 3-hour tracks on repeat, or listen to different ones, one after the other throughout the day. I’ve also seen apps where you can play tracks like mine on continuous repeat. So it’s common for people to listen to them all day while they are studying.
Many people experienced in using alpha brainwave entrainment report that the state of mind associated with alpha waves is a time when they feel most consciously connected to their subconscious mind. The intense experience of hypnagogic sleep, reported by some people as a feeling of being awake and asleep at the same time, is also associated with alpha brainwaves.
  1. You'll access powerful states of thought on-demand. When your mind is trained in this fashion, over time, this state of relaxation... the ability to detach yourself from emotional conflict... think creatively and "out the box"... react faster, and more fluidly... and adapt the same powerful, mental modes accessed by the most successful people will become second nature to you. You'll own them as your own.
Both brainwave entrainment and neurofeedback deal with brainwaves, but the similarity stops there. Entrainment pushes your whole brain into a pre-determined state, while neurofeedback teaches you how to move specific parts of your brain on your own. It is the differeence between forcing the brain into a given position, and skills building so you can move it there yourself. 
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