There isn’t really a one-size-fits-all track or frequency range which is right for all kids while doing homework. So that does make it difficult to recommend one thing in particular, and why I have a number of tracks for studying and focus. If they have already learnt and understood the information, but are just trying to commit it to memory for a test, then I would recommend an alpha track, like the Memorization Study Aid product I have with the 10.4Hz frequency you referred to. If they are still trying to fully understand what is being taught in a workbook, then I would recommend a track that is mainly beta frequencies, like my Study Focus tracks. In the middle, I have a number of tracks which use a combination of beta and alpha wave frequencies, like Study Booster, Study Enhancer and Cognition Enhancer. The last 3 use similar frequencies but deliver the tones and brainwave entrainment effects in different ways. As we are all wired a little differently it does sometimes take a bit of trial and error, to see what method or frequency range works best for the individual. These types of tracks are made for a general audience. In an ideal world, you would hook up to an EEG and see in real time exactly what a person responds to best, depending on the goal and current state of mind.

Maya Mendoza is a published author of 3 personal development books. She has run an NLP / EFT Practice for 29 years helping clients transform problems into personal power. Maya is also a accomplished copywriter and well known Digital Marketing & Social Social Media Strategist - Specializing in Google+ for business. She was named "best marketing consultant" in Glasgow, UK in 2013.  
The pitch frequency measures and describes what a beat sounds like, i.e. does the isochronic beat have a deeper bass sound, or is it high pitched and sharper sounding? The beat waveform frequency describes how many times the beat is repeating per second, i.e. how fast it is beating. You don’t really need to concern yourself about the pitch frequency, as that doesn’t have a direct influence on brainwave entrainment and doesn’t play a part on the measurement on an EEG. I only mentioned it because you were referring to humans not being able to hear below 20Hz. I change the pitch frequency just to suit the mood of the track. For tracks that are to be relaxing, for meditation or sleep, I tend to use a lower pitch frequency so it sounds deeper and more relaxing and I never have that lower than 100Hz. For an energizing, high focus track I might use a more higher pitched 200Hz isochronic tone, because that is sharper sounding and less likely to make you feel sleepy. That’s all you really need to know about the pitch frequency.
I have never been more creative, productive, more loving to all people nor have I ever been happier in my life. All the wisdom I have found in my pursuit of happiness was somewhere in my intellect. Now it is a part of me. I am using it. I now consider myself a model for younger people to let them see how it is possible to function and be everything they’ve wanted to be. I just celebrated my 85th birthday and I am as young as when I was 25. Thank you for giving me the gift of my true self.

While binaural beats are the most common technique we use for producing brainwave entrainment music, we do use other brainwave entrainment techniques such as isochronic tones, monaural beats and amplitude modulation. If these techniques have been used then you will find them mentioned in the written description of the music productions that include them. If not mentioned, then you can assume that binaural beats are the only brainwave entrainment technology in use.
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.

However, if you are looking to do something more practical, like improve your mental sharpness, overcome attention issues, succeed at work, be more productive, you may want audios that target more of the alpha and beta ranges, and are created to put you in peak performance states of mind. In this case, a program like our Effortless Overachiever Bundle would be much more practical and helpful for you.
So what happens when the mind is entrained with a sound or vibration that reflects the thought patterns? When the mind responds to certain frequencies and behaves as a resonator, [there] is a harmonic frequency that the mind can attune to … slower tempos have been proven to decrease heart and respiratory rates, thereby altering the predominant brain-wave patterns.
Well, I finally listened to “Equisync III” after listening to “Equisync I” & the “Equisync II” several times. Let me just say that this put me in another state of consciousness within 7 minutes(guessing) it was beautiful! I meditated throughout the entire 70 minute CD set! It didn’t feel like 70 minutes. I could feel energy in my neck, my solar plexus area and at the brow of my head! Definitely NOT for beginners!
So discovering the field of Brainwave Entrainment is very exciting and promising. However intriguing, there are a few things that make me a bit sceptical towards it. F.i. I’m not too keen on having to rely on any external stimuli, as (regular) meditation is one of the very few things where you are absolutely independent from anything external to make a change within, which to me makes it so special.

Absolutely. Binaural beats were first discovered over 150 years ago, and their use in brainwave entrainment audio has been the subject of a great deal of scientific exploration over the last 35 years in particular. Millions of people use brainwave entrainment music to enhance their quality of life and to experience deep relaxation. In fact, brainwave entrainment technology is now used for more than just meditation. It is also used by a variety of practitioners and private users for improving self-confidence, stress relief, pain management, relaxation, improving and concentration and improving the quality of one's sleep. If you would like to read an objective third party report on binaural beats, please refer to this Wikipedia article.
Meditation enhancement: There are several companies that sell brainwave entrainment sessions specifically designed to enhance meditation. The sounds provide a stimuli to focus on during the meditation, and the brain waves naturally shift towards the frequency provided. Whether meditation is actually enhanced by brainwave entrainment is a subject of debate. However, advanced meditators commonly experience brainwave synchronization – which the right and left hemispheres display the same frequency brain waves.  While there are scientific benefits of meditation, it is unclear as to whether they are enhanced, hindered, or unaffected by adjunctive brainwave entrainment.
Theta brainwaves are next highest in frequency above delta and are especially important for many people using brainwave entrainment and meditation because theta waves are at a threshold, forming a link between wakefulness and the subconscious mind. Theta waves bridge between our awake self and the creative and insightful understandings from below our conscious awareness, and while they are not common in awake adults, they are normative for children under 13 years old. 
The various mental states of the individual are thought to take place across a varied range of frequencies, or brainwaves. By encouraging the frequency following process, entrainment is able to create positive change in the brain, through matching carefully-selected frequencies of light and/or sound. The stimulus enables the individual to access a different state of consciousness, which can be useful for a number of benefits including relaxation, anxiety management, stress reduction and more.
ADHD: In 1997, various researchers conducted a study testing whether children with ADHD (attention-deficit hyperactivity disorder) would benefit from audio-visual entrainment in a school setting. The researchers entrained a small sample of 34 students from 2 different schools. They were given audio-visual entrainment for a period of 1 month and 3 weeks at various times throughout the school day.
Over the past few years, brainwave entrainment products have made a great rise in popularity, reaching more people than ever before and peaking their interest with the many benefits ensured. We now have a continually expanding pool of options to choose from, as well as more information and scientific research on the subject than in the past.  Brainwave Entrainment audios, and the products being made with this technology are literally changing the game in the personal development field, and have become one of the largest catalysts in our recent evolution as a human race.  In fact, these audios may be one of the main contributing factors in unlocking the potential to tap into the untouched 98% of our brains that we are currently not using.

Normally, binaural beats, isochronic tones, or monaural tones have a certain level of capacity to entrain neural activity—and then they bottom out. By combining really great entrainment tools, I wanted to create a better entrainment stimulus that could entrain more neural activity quicker, allowing us to go deeper much more quickly than we have ever been able to go before, and moving our meditation practice or spiritual development to the next level.
The Brain Wave app uses advanced sequences of binaural tones that are combined with configurable ambient nature sounds and atmospheric music (or a person’s iTunes Music) to stimulate specific brainwave patterns.  It includes powerful binaural sequences for sleep, focus, energy, positive mood, confidence, anxiety, stress relief, relaxation, yoga, memory, motivation, headache, concentration and meditation and more.
I am one of the fortunate ones who received a free demo of your product. I do believe your product corrected damage to my brain from a childhood concussion. Immediately upon use, I became aware of sounds, drainage and even discomfort behind my right eye and the lower right side of my skull. This continued for a week of using the product daily. I was about to give up using the product when all discomfort stopped, and has not returned. I do believe your product should be used for childhood head trauma. Even though the brain is only bruised, a life can be altered immensely. I love my Equisync II and will use it daily and with confidence.
I’ve experienced all sorts of internal effects, ranging from feeling “high” to losing all awareness of my body, to seriously feeling like my head was turned completely backwards, only to just have to open my eyes to find it facing straight forward where I left it, to drifting into transcendent states of mind that can hardly even be described with words.
There are many sources of binaural beats on the internet and YouTube to check-out and experiment with yourself – I recommend using headphones for optimal effectiveness. However, like most things, not all binaural beats are created equally (especially if they are free on the internet) and therefore not as effective or enjoyable to listen to. This is why I HIGHLY recommend the binaural beats created by master audio technician, music producer and meditation teacher, Cory Allen – which can be found here:
Quick example: Brainwave readings (with an EEG machine) have shown that brainwaves of 2Hz occur when an individual is asleep. Scientists can create special audio recordings, which contain an encoded 2Hz frequency. While listening to such audio, the brain naturally follows (entrains) toward that 2Hz frequency, lowering its brainwave patterns. That's "brainwave entrainment." The net result is that when listening to such an audio recording, you (the listener) will naturally fall asleep.
The phenomena of brainwave entrainment was first described in the scientific literature in 1973 by Gerald Oster in results published in an article in Scientific American entitled, “Auditory Beats in the Brain”. He showed that a specific brainwave could be induced when a person heard two separate, but closely related, sound frequencies, one in each ear. He discovered that when the frequencies heard by each ear differed by about 10 hertz, the brainwave pattern of the person hearing the sound would synchronize to the difference between the two frequencies. For example, if the person heard a 410 hertz sound in one ear and a 400 hertz sound in the other ear, their brainwaves would stabilize at the difference between the two, or 10 hertz. This technique is called binaural beats, and it is a fundamental principle of brainwave entrainment methods.

I have personally used Holosync, Neuroprogrammer 3, and now I'm currently using Brain Evolution System. They are all great programs within their own rights. Holosync is very pricey and takes many years to complete (6-10 yrs) for their 12 level program and has a hefty price tag of $3195 dollars for the complete set and it uses outdated binaural technology. Neuroprogrammer 3 doesn't have a set time limit for completion as you set your own pace and use whatever sessions you choose to use and you can get the ultimate version for under $100, but this isn't a program that you would use daily in most cases. It does use better technology ( binaural & isochronic ) but it more suited for specialized cases and can be used in conjunction with Holosync or BrainEv. I have just started using BrainEv and I am about to be into the second week. BrainEv uses state of the art binaural and isochronic technology and brings you through your states at a much rapid rate whereas Holosync focuses mainly on certain brain wave patterns during its sessions which could get your mind stuck in certain states because the brain gets used to the specific states it's been entrained to. Also, BrainEv takes just 6 months to complete and you can feel it working immediately. Holosync did do it's job but BrainEv takes the cake on this one due to the short duration of time it takes to complete and uses more advanced entrainment techniques that doesnt leave your mind in a static state. So I would difinately suggest using BrainEv ( first month is free; $299 for all 6 sets ) in conjunction with Neuroprogrammer 3 for more specialized brain training.

I’m working as a consultant for a new and growing holistic wellness company. I am responsible for determining which products would be the most advantageous for both our patients and for retail sales. I have personally purchased the Equisync I CDs to test them. My daughter suffers from major anxiety. The CDs helps her to relax and be less anxious. I tried it myself one time and it was very effective at putting me into a deep meditative state. I believe that your product works and I would like the wellness company to carry Equisync for patients to use and purchase.

a concise P.S. I was in a horrible car accident when I was 18 and had to learn to read and write and walk and talk all over again. It was long ago and I’m pretty well over it, but such an injury has lifetime repercussions. The neurological damage sustained causes my left arm to shake uncontrollably anytime I use it in a situation requiring precise coordination. From simply listening to the demo, the shake [though not disappearing completely in the last 2 months] has lessened dramatically. I had been wondering for years what kind of neurological exercises I could undergo to help it…
…I got curious about the Equisync II CDs and it was the 2nd track that started giving me some body signs that revealed me I was in the alpha state. I never practiced meditation before, however, I follow the Gurdjieff and Ouspensky teachings which, if you are not aware, tell us how to do quite the same thing as meditation in our everyday lives while performing our daily tasks. I also believe that Equisync II was more appropriate for me because my life is also dedicated to collective causes, my personal life is totally under control, but your CDs were able to relieve my severe depression after only 3 days of practicing, my chronic insomnia condition which had been lasting for over 27 years seemed to be finally healed. I am truly amazed, really.
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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