Our everyday, waking brain used for active intelligence operates at approximately 13 hertz, which is in the range of high alpha or low beta frequencies. People who have certain learning disabilities and problems with attention often have low levels of 13 hertz frequency brainwaves in crucial areas of the brain used for sequencing tasks and doing simple math calculations. This is one concrete example of how brainwaves are associated with thinking and behavior. Each identified brainwave frequency has a different effect on a person’s ability to think, act, and feel.
In general, we are accustomed to being in the beta brain rhythm. We are in a Beta brainwave pattern when we are consciously alert. It is the default and dominant brainwave for most of us most of the time. We are in Beta when we feel agitated, tense, hurried, pressured, afraid and stressed. The frequencies range from 13 to 60 pulses per second in the Hertz scale.
It seems I can get the same effect as Brain Salon just by putting on various music styles so I’m a little intrigued but kudos to them because I am sure lots of people may try this. If you tell someone they will feel focused after listening to this, will they not feel focused? If you tell someone this is a calming cd and then ask them how they feel after listening to the cd, I bet they feel calm. Do you know why they would suggest not using while pregnant?
By the end of just a few short days (3 or 4 of use), my constant “on edge” feeling completely dissipated. I had changed my lifestyle drastically to a very low-stress environment. All feelings of anxiety disappeared rapidly, but I was still experiencing something “physical.” I had trouble explaining it to anyone. I lashed out immediately at the slightest frustration. I tried to explain to those around me that it was something physically happening in my brain, but they were skeptical. Within less than a week of using the EOC cd’s, I noticed my tolerance level for dealing with people and situations had increased tremendously.

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 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.
As Dawkins explains, ideas spread through the behavior that they produce in their hosts, which is what enables them to be transmitted from one brain to another. For example, an ideology — such as a religion — that causes its inhabitants to practice its rituals and communicate its beliefs will be transmitted to others. Successful ideas are those that are best able to spread themselves, while those that fail to self-replicate go extinct. In this way, some religious ideologies persist while others fade into oblivion.
The stress of the mind control eventually causes Anabel to pass out, forcing Guile to use her as a hostage in order to force Noland to give him the Jirachi Report, which contains the secrets of how to make Jirachi grant his wish. When Noland is unsure about what to do, Guile attacks him and takes the report by force. Now knowing Jirachi's secret, Guile has Jirachi create a gigantic Kyogre made of seawater and uses it to flood the entire Battle Frontier. Anabel is taken to safety by Latios and later awakens to help the Frontier Brains fight off Guile's rental Pokémon while Emerald and the other Pokédex holders fight Guile. Eventually, Emerald and the Pokédex holders manage to defeat Guile and destroy the gigantic Kyogre monster. The day after, an injured Anabel and the other Frontier Brains congratulate Emerald for the hard work he put into saving everyone. Anabel then awards Emerald the Ability Symbol for his skills in traversing the Battle Tower.
When the brain is stimulated with pulsed sounds (neuro-electrical activity via the nerves originating from the ears), the overall activity of the brain will respond to and align with these pulses. By selecting the desired rate, the brain — via the frequency following response (entrainment) — can be naturally induced towards the selected brainwave state.
The studies included in the recent reviews of Tai Chi and yoga indicate that sessions between 60 and 90 minutes performed 2 to 3 days per week were effective in reducing stress and improving feelings of well-being (7,14,17). A study conducted in a worksite environment showed that 15 minutes of chair-based yoga postures was effective in reducing acute stress when assessed by self-report and with physiological measures (e.g., respiration rate and heart rate variability parameters). This finding indicates that shorter duration sessions can be effective in reducing acute stress with this type of exercise (15).
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!
Anyone who has sought out different methods for enhancing cognitive ability will probably have come across a technique known as Brainwave Entrainment. However, it is a fairly niche area of brain training, meaning that this form of stimulation is often overlooked in favour of more mainstream methods. The following outlines what Brainwave Entrainment actually is, how it is used, and some of the benefits attributed to it.
In physics, entrainment is the process of two oscillating systems coming to assume the same periodic rhythm, such as is observed when two clocks slowly synchronize their ticking and tick together in harmony after some time. Pendulums also achieve this same synchronicity when swinging in close proximity to one another, a phenomenon first observed and written about in 1665 by Christiaan Huygens, a Dutch scientist.
“I have been using them as often as I could over the past week. During this time, I have undertaken editing a book, and plenty of reading, amongst other things. To help, I used the 'Razor Sharp' audio. It was like I was in my own little bubble of concentration. Amazing! I will continue to use this one every time I am working on something at the computer.